Visken ® (pindolol), a synthetic beta-adrenergic receptor blocking agent with intrinsic sympathomimetic activity is 1-(Indol-4-yloxy)-3-(isopropylamino)-2-propanol.

Its structural formula is:

Pindolol is a white to off-white odorless powder soluble in organic solvents and aqueous acids. Visken ® (pindolol) is intended for oral administration.

5 mg and 10 mg Tablets

Active Ingredient: pindolol

Inactive Ingredients: colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose, and pregelatinized starch.

Last updated on RxList: 2/13/2008

Visken ® (pindolol) is indicated in the management of hypertension. It may be used alone or concomitantly with other antihypertensive agents, particularly with a thiazide-type diuretic.

The dosage of Visken ® (pindolol) should be individualized. The recommended initial dose of Visken® (pindolol) is 5 mg b.i.d. alone or in combination with other antihypertensive agents. An antihypertensive response usually occurs within the first week of treatment. Maximal response, however, may take as long as or occasionally longer than 2 weeks. If a satisfactory reduction in blood pressure does not occur within 3-4 weeks, the dose may be adjusted in increments of 10 mg/day at these intervals up to a maximum of 60 mg/day.

Visken ® (pindolol) tablets, USP

White, uncoated, heart-shaped tablets; 5 mg and 10 mg, packages of 100. 5 mg tablets engraved "VISKEN 5'' on one side, and embossed "V'' on other side (NDC 0078-0111-05). 10 mg tablets engraved "VISKEN 10'' on one side, and embossed "V'' on other side (NDC 0078-0073-05).

Store and Dispense

Below 86°F (30°C); tight, light-resistant container.

Manufactured by: Novartis Pharmaceuticals Canada Inc. Dorval (Quebec) Canada H9R 4P5. Distributed by: Novartis Pharmaceuticals Corporation, East Hanover, New Jersey 07936. REV: MAY 2007. FDA Rev date: 10/27/2007

Last updated on RxList: 2/13/2008

Most adverse reactions have been mild. The incidences listed in the following table are derived from 12-week comparative double-blind, parallel design trials in hypertensive patients given Visken ® (pindolol) as monotherapy, given various active control drugs as monotherapy, or given placebo. Data for Visken® (pindolol) and the positive controls were pooled from several trials because no striking differences were seen in the individual studies, with 1 exception. When considering all adverse reactions reported, the frequency of edema was noticeably higher in positive control trials [16% Visken® (pindolol) vs. 9% positive control] than in placebo controlled trials [6%Visken® (pindolol) vs. 3% placebo]. The table includes adverse reactions either volunteered or elicited, and at least possibly drug related, which were reported in greater than 2% of Visken® (pindolol) patients and other selected important reactions.

Adverse Reactions Which Were Volunteered or Elicited (and at least possibly drug related)

Body System/Adverse Reactions	Visken ® (pindolol) (N=322) %	Active Controls* (N=188) %	Placebo (N=78) %
Central Nervous System
Bizarre or Many Dreams	5	0	6
Dizziness	9	11	1
Fatigue	8	4	4
Hallucinations	<1	0
Insomnia	10	3	10
Nervousness	7	3	5
Weakness	4	2	1
Autonomic Nervous System
Paresthesia	3	1	6
Cardiovascular
Dyspnea	5	4	6
Edema	6	3	1
Heart Failure	<1	<1	0
Palpitations	<1	1	0
Musculoskeletal
Chest Pain	3	1	3
Joint Pain	7	4	4
Muscle Cramps	3	1	0
Muscle Pain	10	9	8
Gastrointestinal
Abdominal Discomfort	4	4	5
Nausea	5	2	1
Skin
Pruritus	1	<1	0
Rash	<1	<1	1
*Active Controls: Patients received either propranolol, a-methyldopa or a diuretic (hydrochlorothiazide or chlorthalidone).

The following selected (potentially important) adverse reactions were seen in 2% or fewer patients and their relationship to Visken ® (pindolol) is uncertain. CENTRAL NERVOUS SYSTEM: anxiety, lethargy; AUTONOMIC NERVOUS SYSTEM: visual disturbances, hyperhidrosis; CARDIOVASCULAR: bradycardia, claudication, cold extremities, heart block, hypotension, syncope, tachycardia, weight gain; GASTROINTESTINAL: diarrhea, vomiting; RESPIRATORY: wheezing; UROGENITAL: impotence, pollakiuria; MISCELLANEOUS: eye discomfort or burning eyes.

Potential Adverse Effects

In addition, other adverse effects not aforementioned have been reported with other beta-adrenergic blocking agents and should be considered potential adverse effects of Visken ® (pindolol).

Central Nervous System : Reversible mental depression progressing to catatonia; an acute reversible syndrome characterized by disorientation for time and place, short-term memory loss, emotional lability, slightly clouded sensorium, and decreased performance on neuropsychometrics.

Cardiovascular : Intensification of AV block. (See CONTRAINDICATIONS)

Allergic : Erythematous rash; fever combined with aching and sore throat; laryngospasm; respiratory distress.

Hematologic : Agranulocytosis; thrombocytopenic and nonthrombocytopenic purpura.

Gastrointestinal: Mesenteric arterial thrombosis; ischemic colitis.

Miscellaneous : Reversible alopecia; Peyronie's disease.

The oculomucocutaneous syndrome associated with the beta-blocker practolol has not been reported with Visken ® (pindolol) during investigational use and extensive foreign experience amounting to over 4 million patient-years.

Catecholamine-depleting drugs (e.g., reserpine) may have an additive effect when given with beta-blocking agents. Patients receiving Visken ® (pindolol) plus a catecholamine-depleting agent should, therefore, be closely observed for evidence of hypotension and/or marked bradycardia which may produce vertigo, syncope, or postural hypotension.

Visken ® (pindolol) has been used with a variety of antihypertensive agents, including hydrochlorothiazide, hydralazine, and guanethidine without unexpected adverse interactions.

Visken ® (pindolol) has been shown to increase serum thioridazine levels when both drugs are co-administered. Visken® (pindolol) levels may also be increased with this combination.

Risk of Anaphylactic Reaction

While taking beta blockers, patients with a history of severe anaphylactic reaction to a variety of allergens may be more reactive to repeated challenge, either accidental, diagnostic, or therapeutic. Such patients may be unresponsive to the usual doses of epinephrine used to treat allergic reaction.

Last updated on RxList: 2/13/2008

Cardiac Failure

Sympathetic stimulation may be a vital component supporting circulatory function in patients with congestive heart failure, and its inhibition by beta-blockade may precipitate more severe failure. Although beta-blockers should be avoided in overt congestive heart failure, if necessary, Visken ® (pindolol) can be used with caution in patients with a history of failure who are well-compensated, usually with digitalis and diuretics. Both digitalis glycosides and beta-blockers slow atrioventricular conduction and decrease heart rate. Concomitant use can increase risk of bradycardia. Beta-adrenergic blocking agents do not abolish the inotropic action of digitalis on heart muscle.

In Patients Without History of Cardiac Failure

In patients with latent cardiac insufficiency, continued depression of the myocardium with beta-blocking agents over a period of time can in some cases lead to cardiac failure. At the first sign or symptom of impending cardiac failure, patients should be fully digitalized and/or be given a diuretic, and the response observed closely. If cardiac failure continues, despite adequate digitalization and diuretic, Visken ® (pindolol) therapy should be withdrawn (gradually if possible).

Exacerbation of Ischemic Heart Disease Following Abrupt Withdrawal

Hypersensitivity to catecholamines has been observed in patients withdrawn from beta-blocker therapy; exacerbation of angina and, in some cases, myocardial infarction have occurred after abrupt discontinuation of such therapy. When discontinuing chronically administered Visken® (pindolol), particularly in patients with ischemic heart disease, the dosage should be gradually reduced over a period of 1-2 weeks and the patient should be carefully monitored. If angina markedly worsens or acute coronary insufficiency develops, Visken® (pindolol) administration should be reinstituted promptly, at least temporarily, and other measures appropriate for the management of unstable angina should be taken. Patients should be warned against interruption or discontinuation of therapy without the physician's advice. Because coronary artery disease is common and may be unrecognized, it may be prudent not to discontinue Visken® (pindolol) therapy abruptly even in patients treated only for hypertension.

Nonallergic Bronchospasm (e.g., chronic bronchitis, emphysema) - Patients with Bronchospastic Diseases Should in General Not Receive Beta - Blockers

Visken ® (pindolol) should be administered with caution since it may block bronchodilation produced by endogenous or exogenous catecholamine stimulation of beta2 receptors.

Major Surgery

Because beta blockade impairs the ability of the heart to respond to reflex stimuli and may increase the risks of general anesthesia and surgical procedures, resulting in protracted hypotension or low cardiac output, it has generally been suggested that such therapy should be gradually withdrawn several days prior to surgery. Recognition of the increased sensitivity to catecholamines of patients recently withdrawn from beta-blocker therapy, however, has made this recommendation controversial. If possible, beta-blockers should be withdrawn well before surgery takes place. In the event of emergency surgery, the anesthesiologist should be informed that the patient is on beta-blocker therapy.

The effects of Visken ® (pindolol) can be reversed by administration of beta-receptor agonists such as isoproterenol, dopamine, dobutamine, or levarterenol. Difficulty in restarting and maintaining the heart beat has also been reported with beta-adrenergic receptor blocking agents.

Diabetes and Hypoglycemia

Beta-adrenergic blockade may prevent the appearance of premonitory signs and symptoms (e.g., tachycardia and blood pressure changes) of acute hypoglycemia. This is especially important with labile diabetics. Beta-blockade also reduces the release of insulin in response to hyperglycemia; therefore, it may be necessary to adjust the dose of antidiabetic drugs.

Thyrotoxicosis

Beta-adrenergic blockade may mask certain clinical signs (e.g., tachycardia) of hyperthyroidism. Patients suspected of developing thyrotoxicosis should be managed carefully to avoid abrupt withdrawal of beta-blockade which might precipitate a thyroid crisis.

Impaired Renal or Hepatic Function

Beta-blocking agents should be used with caution in patients with impaired hepatic or renal function. Poor renal function has only minor effects on Visken ® (pindolol) clearance, but poor hepatic function may cause blood levels of Visken® (pindolol) to increase substantially.

Carcinogenesis, Mutagenesis, Impairment of Fertility

In chronic oral toxicologic studies (1-2 years) in mice, rats, and dogs, Visken ® (pindolol) did not produce any significant toxic effects. In 2-year oral carcinogenicity studies in rats and mice in doses as high as 59 mg/kg/day and 124 mg/kg/day (50 and 100 times the maximum recommended human dose), respectively, Visken® (pindolol) did not produce any neoplastic, preneoplastic, or nonneoplastic pathologic lesions. In fertility and general reproductive performance studies in rats, Visken® (pindolol) caused no adverse effects at a dose of 10 mg/kg.

In the male fertility and general reproductive performance test in rats, definite toxicity characterized by mortality and decreased weight gain was observed in the group given 100 mg/kg/day. At 30 mg/kg/day, decreased mating was associated with testicular atrophy and/or decreased spermatogenesis. This response is not clearly drug related, however, as there was no dose response relationship within this experiment and no similar effect on testes of rats administered Visken ® (pindolol) as a dietary admixture for 104 weeks. There appeared to be an increase in prenatal mortality in males given 100 mg/kg but development of offspring was not impaired.

In females administered Visken ® (pindolol) prior to mating through day 21 of lactation, mating behavior was decreased at 100 mg/kg and 30 mg/kg. At these dosages there also was increased mortality of offspring. Prenatal mortality was increased at 10 mg/kg but there was not a clear dose response relationship in this experiment. There was an increased resorption rate at 100 mg/kg observed in females necropsied on the 15th day of gestation.

Pregnancy

Category B

Studies in rats and rabbits exceeding 100 times the maximum recommended human doses, revealed no embryotoxicity or teratogenicity. Since there are no adequate and well-controlled studies in pregnant women, and since animal reproduction studies are not always predictive of human response, Visken ® (pindolol), as with any drug, should be employed during pregnancy only if the potential benefit justifies the potential risk to the fetus.

Nursing Mothers

Since Visken ® (pindolol) is secreted in human milk, nursing should not be undertaken by mothers receiving the drug.

Pediatric Use

Safety and effectiveness in pediatric patients have not been established.

Clinical Laboratory

Minor persistent elevations in serum transaminases (SGOT, SGPT) have been noted in 7% of patients during Visken ® (pindolol) administration, but progressive elevations were not observed. These elevations were not associated with any other abnormalities that would suggest hepatic impairment, such as decreased serum albumin and total proteins. During more than a decade of worldwide marketing, there have been no reports in the medical literature of overt hepatic injury. Alkaline phosphatase, lactic acid dehydrogenase (LDH), and uric acid are also elevated on rare occasions. The significance of these findings is unknown.

Last updated on RxList: 2/13/2008

No specific information on emergency treatment of overdosage is available. Therefore, on the basis of the pharmacologic actions of Visken ® (pindolol), the following general measures should be employed as appropriate in addition to gastric lavage:

Excessive Bradycardia : administer atropine; if there is no response to vagal blockade, administer isoproterenol cautiously.

Cardiac Failure : digitalize the patient and/or administer diuretic. It has been reported that glucagon may be useful in this situation.

Hypotension : administer vasopressors, e.g., epinephrine or levarterenol, with serial monitoring of blood pressure. (There is evidence that epinephrine may be the drug of choice.)

Bronchospasm : administer a beta 2 stimulating agent such as isoproterenol and/or a theophylline derivative.

A case of an acute overdosage has been reported with an intake of 500 mg of Visken ® (pindolol) by a hypertensive patient. Blood pressure increased and heart rate was ³80 beats/min. Recovery was uneventful. In another case, 250 mg of Visken® (pindolol) was taken with 150 mg diazepam and 50 mg nitrazepam, producing coma and hypotension. The patient recovered in 24 hours.

Visken ® (pindolol) is contraindicated in: 1) bronchial asthma; 2) overt cardiac failure; 3) cardiogenic shock; 4) second and third degree heart block; 5) severe bradycardia. (See WARNINGS)

Last updated on RxList: 2/13/2008

Visken ® (pindolol) is a non-selective beta-adrenergic antagonist (beta-blocker) which possesses intrinsic sympathomimetic activity (ISA) in therapeutic dosage ranges but does not possess quinidine-like membrane stabilizing activity.

Pharmacodynamics

In standard pharmacologic tests in man and animals, Visken ® (pindolol) attenuates increases in heart rate, systolic blood pressure, and cardiac output resulting from exercise and isoproterenol administration, thus confirming its beta-blocking properties. The ISA or partial agonist activity of Visken® (pindolol) is mediated directly at the adrenergic receptor sites and may be blocked by other beta-blockers. In catecholamine-depleted animal experiments, ISA is manifested as an increase in the inotropic and chronotropic activity of the myocardium. In man, ISA is manifested by a smaller reduction in the resting heart rate (4-8 beats/min) than is seen with drugs lacking ISA. There is also a smaller reduction in resting cardiac output. The clinical significance of this observation has not been evaluated and there is no evidence, or reason to believe, that exercise cardiac output is less affected by Visken® (pindolol).

Visken ® (pindolol) has been shown in controlled, double-blind clinical studies to be an effective antihypertensive agent when used as monotherapy, or when added to therapy with thiazide-type diuretics. Divided dosages in the range of 10-60 mg daily have been shown to be effective. As monotherapy, Visken® (pindolol) is as effective as propranolol, a-methyldopa, hydrochlorothiazide, and chlorthalidone in reducing systolic and diastolic blood pressure. The effect on blood pressure is not orthostatic, i.e. Visken® (pindolol) was equally effective in reducing the supine and standing blood pressure.

In open, long-term studies up to 4 years, no evidence of diminution of the blood pressure-lowering response was observed.

An average 3-pound increase in body weight has been noted in patients treated with Visken ® (pindolol) alone, a larger increase than was observed with propranolol or placebo. The weight gain appeared unrelated to blood pressure response and was not associated with an increased risk of heart failure, although edema was more common than in control patients. Visken® (pindolol) does not have a consistent effect on plasma renin activity.

The mechanism of the antihypertensive effects of beta-blocking agents has not been established, but several mechanisms have been postulated: 1) an effect on the central nervous system resulting in a reduced sympathetic outflow to the periphery, 2) competitive antagonism of catecholamines at peripheral (especially cardiac) adrenergic receptor sites, leading to decreased cardiac output, 3) an inhibition of renin release. These mechanisms appear less likely for pindolol than other beta-blockers in view of the modest effect on resting cardiac output and renin.

Beta-blockade therapy is useful when it is necessary to suppress the effects of beta-adrenergic agonists in order to achieve therapeutic goals. However, in certain clinical situations, (e.g., cardiac failure, heart block, bronchospasm), the preservation of an adequate sympathetic tone may be necessary to maintain vital functions. Although a beta-antagonist with ISA such as Visken ® (pindolol) does not eliminate sympathetic tone entirely, there is no controlled evidence that it is safer than other beta-blockers in such conditions as heart failure, heart block, or bronchospasm or is less likely to cause those conditions. In single dose studies of the effects of beta-blockers on FEV1, Visken® (pindolol) was indistinguishable from other non-cardioselective agents in its reduction of FEV1, and its reduction in the effectiveness of an exogenous beta agonist.

Exacerbation of angina and, in some cases, myocardial infarction and ventricular dysrhythmias have been reported after abrupt discontinuation of therapy with beta-adrenergic blocking agents in patients with coronary artery disease. Abrupt withdrawal of these agents in patients without coronary artery disease has resulted in transient symptoms, including tremulousness, sweating, palpitation, headache, and malaise. Several mechanisms have been proposed to explain these phenomena, among them increased sensitivity to catecholamines because of increased numbers of beta receptors.

Pharmacokinetics And Metabolism

Visken ® (pindolol) is rapidly and reproducibly absorbed (greater than 95%), achieving peak plasma concentrations within 1 hour of drug administration. Visken® (pindolol) has no significant first-pass effect. The blood concentrations are proportional in a linear manner to the administered dose in the range of 5-20 mg. Upon repeated administration to the same subject, variation is minimal. After a single dose, intersubject variation for peak plasma concentrations was about 4fold (e.g., 45-167 ng/mL for a 20 mg dose). Upon multiple dosing, intersubject variation decreased to 2-2.5 fold. Visken® (pindolol) is only 40% bound to plasma proteins and is evenly distributed between plasma and red cells. The volume of distribution in healthy subjects is about 2 L/kg.

Visken ® (pindolol) undergoes extensive metabolism in animals and man. In man, 35%-40% is excreted unchanged in the urine and 60%-65% is metabolized primarily to hydroxy-metabolites which are excreted as glucuronides and ethereal sulfates. The polar metabolites are excreted with a half-life of approximately 8 hours and thus multiple dosing therapy (q.8H) results in a less than 50% accumulation in plasma. About 6%-9% of an administered intravenous dose is excreted by the bile into the feces.

The disposition of Visken ® (pindolol) after oral administration is monophasic with a half-life in healthy subjects or hypertensive patients with normal renal function of approximately 3-4 hours. Following t.i.d. administration (q.8H), no significant accumulation of Visken® (pindolol) is observed.

In elderly hypertensive patients with normal renal function, the half-life of Visken ® (pindolol) is more variable, averaging about 7 hours, but with values as high as 15 hours.

In hypertensive patients with renal diseases, the half-life is within the range expected for healthy subjects. However, a significant decrease (50%) in volume of distribution (V D) is observed in uremic patients and VD appears to be directly correlated to creatinine clearance. Therefore, renal drug clearance is significantly reduced in uremic patients, resulting in a significant decrease in urinary excretion of unchanged drug. Uremic patients with a creatinine clearance of less than 20 mL/min generally excreted less than 15% of the administered dose unchanged in the urine.

In patients with histologically diagnosed cirrhosis of the liver, the elimination of Visken ® (pindolol) was more variable in rate and generally significantly slower than in healthy subjects. The total body clearance of Visken® (pindolol) in cirrhotic patients ranged from about 50-300 mL/min and was directly correlated to antipyrine clearance. The half-life ranges from 2.5 hours to greater than 30 hours. These findings strongly suggest that caution should be exercised in dosage adjustments of Visken® (pindolol) in such patients.

The bioavailability of Visken ® (pindolol) is not significantly affected by co-administration of food, hydralazine, hydrochlorothiazide or aspirin. Visken® (pindolol) has no effect on warfarin activity or the clinical effectiveness of digoxin, although small transient decreases in plasma digoxin concentrations were noted.

Last updated on RxList: 2/13/2008

Patients, especially those with evidence of coronary artery insufficiency, should be warned against interruption or discontinuation of Visken ® (pindolol) therapy without the physician's advice. Although cardiac failure rarely occurs in properly selected patients, patients being treated with beta-adrenergic blocking agents should be advised to consult the physician at the first sign or symptom of impending failure.

Last updated on RxList: 2/13/2008

IMPORTANT NOTE: This is a summary and does not contain all possible information about this product. For complete information about this product or your specific health needs, ask your health care professional. Always seek the advice of your health care professional if you have any questions about this product or your medical condition. This information is not intended as individual medical advice and does not substitute for the knowledge and judgment of your health care professional. This information does not contain any assurances that this product is safe, effective, or appropriate for you.

PINDOLOL - ORAL

(PIN-doe-lole)

USES: This medication is used alone or with other medications to treat high blood pressure. Lowering high blood pressure helps prevent strokes, heart attacks and kidney problems. Pindolol belongs to a class of medications called beta-blockers. It works by blocking the effects of certain natural substances (such as epinephrine and adrenalin) on the heart and blood vessels. This results in a lowering of the heart rate, blood pressure, and strain on the heart.

OTHER USES: This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional.

Pindolol may also be used to treat a certain type of chest pain (angina). It may reduce the frequency of chest pain episodes and improve your ability to exercise. Your doctor may also use this medication to treat other conditions.

HOW TO USE: Take this medication by mouth with or without food, usually twice daily or as directed by your doctor.

The dosage is based on your medical condition and response to therapy. It may take 1-2 weeks before the full benefit of this drug takes effect. It is important to continue taking this medication even if you feel well. Most people with high blood pressure do not feel sick.

Use this medication regularly in order to get the most benefit from it. To help you remember, use it at the same times each day.

Do not stop taking this medication without first consulting your doctor, especially if you have chest pain (angina) or heart disease. Your condition may become worse when the drug is suddenly stopped. If your doctor decides you should no longer use this drug, you must gradually decrease your dose according to your doctor's instructions.

When gradually stopping this medication, it is recommended that you temporarily limit physical activity to decrease work for the heart. Seek immediate medical attention if you develop new or worsening chest pain. (See also Side Effects section.)

Inform your doctor if your condition persists or worsens (e.g., routine blood pressure readings increase).

SIDE EFFECTS: Dizziness, drowsiness, weakness, and nausea may occur as your body adjusts to the medication. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.

This drug may reduce blood flow to your hands and feet, causing them to feel cold. Smoking may worsen this effect. Avoid tobacco use and dress warmly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Medications in this class may cause or worsen heart failure. Tell your doctor immediately if you notice any of the following unlikely but very serious side effects: swelling of the feet/ankles, shortness of breath, severe tiredness, unexplained/sudden weight gain.

Tell your doctor immediately if any of these unlikely but serious side effects occur: bluish color of the fingers/toes/nails, hair loss (reversible), mental/mood changes (e.g., confusion, depression, memory problems), pain/cramps in the muscles/joints, numbness/tingling, decreased sexual ability, vision changes.

Seek immediate medical attention if any of these unlikely but very serious side effects occur: chest pain, jaw/left arm pain, slow/irregular/fast heartbeat, severe dizziness/fainting.

A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may include: rash, itching, swelling, severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

Contact your doctor for medical advice about side effects. The following numbers do not provide medical advice, but in the US you may report side effects to the Food and Drug Administration (FDA) at 1-800-FDA-1088. In Canada, you may call Health Canada at 1-866-234-2345.

PRECAUTIONS: Before taking pindolol, tell your doctor or pharmacist if you are allergic to it; or to other beta-blockers (e.g., acebutolol); or if you have any other allergies.

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: asthma, very slow heartbeat (e.g., sinus bradycardia, second- or third-degree atrioventricular block), a certain serious heart condition (cardiogenic shock), uncontrolled severe heart failure.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: severe allergic reactions (e.g., anaphylaxis), breathing problems (e.g., chronic obstructive lung disease-COPD, emphysema, chronic bronchitis), blood circulation problems (e.g., Raynaud's disease, peripheral vascular disease), low blood flow to the heart/brain (e.g., due to coronary artery disease, stroke, transient ischemic attack), diabetes, heart problems (e.g., heart failure, heart attack), kidney disease, liver disease, mental/mood disorders (e.g., depression), a certain muscle problem (myasthenia gravis), overactive thyroid (hyperthyroidism), a certain type of tumor (pheochromocytoma).

This drug may make you dizzy or drowsy; use caution while engaging in activities requiring alertness such as driving or using machinery. Limit alcoholic beverages.

To minimize dizziness and lightheadedness, get up slowly when rising from a seated or lying position.

Before having surgery, tell your doctor or dentist that you are taking this medication.

This drug may infrequently make your blood sugar level rise, causing or worsening diabetes. Tell your doctor immediately if you develop symptoms of high blood sugar such as increased thirst or frequent urination.

If you have diabetes, this medication may mask the fast/pounding heartbeat you would usually feel when your blood sugar level falls too low (hypoglycemia). Other symptoms of a low blood sugar level such as dizziness and sweating are unaffected by this drug.

Kidney function declines as you grow older. This medication is removed by the kidneys and liver. Therefore, elderly people may be at greater risk for side effects such as dizziness while using this drug.

This medication should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor.

This drug passes into breast milk. Breast-feeding while using this drug is not recommended. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: Your healthcare professionals (e.g., doctor or pharmacist) may already be aware of any possible drug interactions and may be monitoring you for it. Do not start, stop or change the dosage of any medicine before checking with them first.

This drug should not be used with the following medications because very serious interactions may occur: arbutamine, thioridazine.

If you are currently using any of these medications, tell your doctor or pharmacist before starting this drug.

Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription products you may use, especially of: alpha-blockers (e.g., prazosin), other beta-blockers (e.g., atenolol), bronchodilators (e.g., albuterol, theophylline), calcium-channel blockers (e.g., diltiazem, verapamil), clonidine, drugs for diabetes (e.g., glipizide, glyburide, insulin), epinephrine, fenoldopam, nasal decongestants (e.g., phenylephrine, pseudoephedrine), nonsteroidal anti-inflammatory drugs (NSAIDs such as ibuprofen and naproxen), other drugs for high blood pressure (e.g., methyldopa, reserpine), drugs affecting liver enzymes that remove this medication from your body (e.g., amiodarone, chlorpromazine, St. John's wort).

Tell your doctor or pharmacist if you also take drugs that cause drowsiness such as: certain antihistamines (e.g., diphenhydramine), anti-seizure drugs (e.g., carbamazepine), medicine for sleep or anxiety (e.g., alprazolam, zolpidem), muscle relaxants, narcotic pain relievers (e.g., codeine), psychiatric medicines (e.g., amitriptyline, risperidone, trazodone).

Check the labels on all your medicines (e.g., cough-and cold products, diet aids, nonsteroidal anti-inflammatory drugs-NSAIDs for pain/fever reduction) because they may contain ingredients that could cause drowsiness or increase your heart rate or blood pressure. Ask your pharmacist about the safe use of those products.

This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.

OVERDOSE: If overdose is suspected, contact your local poison control center or emergency room immediately. US residents can call the US national poison hotline at 1-800-222-1222. Canadian residents should call their local poison control center directly. Symptoms of overdose may include: very slow heartbeat, severe dizziness/fainting, slow/shallow breathing.

NOTES: Do not share this medication with others. Lifestyle changes such as stress reduction programs, exercise, and dietary changes may increase the effectiveness of this medicine. Talk to your doctor or pharmacist about lifestyle changes that might benefit you.

Have your blood pressure checked regularly while taking this medication. Discuss with your doctor how to monitor your own blood pressure and pulse.

Laboratory and/or medical tests (e.g., blood pressure, liver tests) should be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.

MISSED DOSE: If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.

STORAGE: Store at room temperature between 59-86 degrees F (between 15-30 degrees C) away from light and moisture. Do not store in the bathroom. Keep all medicines away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.

MEDICAL ALERT: Your condition can cause complications in a medical emergency. For enrollment information, call MedicAlert at 1-800-854-1166 (USA), or 1-800-668-1507 (Canada).

Information last revised July 2008 Copyright(c) 2008 First DataBank, Inc.