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Cardiac Ischemia After Abrupt Discontinuation
When discontinuing chronically administered Innopran XL, particularly in patients with ischemic heart disease, gradually reduce the dose over a period of 1-2 weeks and monitor the patients. If angina markedly worsens or acute coronary insufficiency develops, promptly resume therapy, at least temporarily and take other measures appropriate for the management of unstable angina. Warn patients against interruption or discontinuation of therapy without physician's advice.
Beta-blockers, like Innopran XL, can cause depression of myocardial contractility and may precipitate heart failure and cardiogenic shock. If signs or symptoms of heart failure develop, treat the patient according to recommended guidelines. It may be necessary to lower the dose of Innopran XL or to discontinue it.
Maintain During Major Surgery
Chronically administered beta-blocking therapy, including Innopran XL, should not be routinely withdrawn prior to major surgery; however, the impaired ability of the heart to respond to reflex adrenergic stimuli may augment the risks of general anesthesia and surgical procedures.
Masked Signs Of Hypoglycemia
Innopran XL may mask clinical signs of hyperthyroidism, such as tachycardia. Avoid abrupt withdrawal of beta-blockade, which may precipitate a thyroid storm.
Bradycardia, including sinus pause, heart block, and cardiac arrest have occurred with the use of Innopran XL. Patients with first-degree atrioventricular block, sinus node dysfunction, or conduction disorders (including Wolff-Parkinson-White) may be at increased risk. The concomitant use of beta adrenergic blockers and non-dihydropyridine calcium channel blockers (e.g., verapamil and diltiazem), digoxin or clonidine increases the risk of significant bradycardia. Monitor heart rate and rhythm in patients receiving Innopran XL. If severe bradycardia develops, reduce or stop Innopran XL.
Reduced Effectiveness Of Epinephrine In Treating Anaphylaxis
Beta adrenergic blocker-treated patients treated with epinephrine for a severe anaphylactic reaction may be less responsive to the typical doses of epinephrine. In these patients, consider other medications (e.g., intravenous fluids, glucagon).
Carcinogenesis, Mutagenesis, Impairment Of Fertility
In dietary administration studies in which mice and rats were treated with propranolol HCl for up to 18 months at doses of up to 150 mg/kg/day, there was no evidence of drug-related tumorigenesis. On a body surface area basis, this dose in the mouse and rat is, respectively, about equal to and about twice the MRHD of 640 mg propranolol HCl. In a study in which both male and female rats were exposed to propranolol HCl in their diets at concentrations of up to 0.05% (about 50 mg/kg body weight and less than the MRHD), from 60 days prior to mating and throughout pregnancy and lactation for 2 generations, there were no effects on fertility. Based on differing results from Ames tests performed by different laboratories, there is equivocal evidence for a genotoxic effect of propranolol HCl in bacteria (S. typhimurium strain TA 1538).
Use In Specific Populations
Pregnancy Category C
There are no adequate and well controlled studies in pregnant women. Intrauterine growth retardation, small placentas, and congenital anomalies have been reported for neonates whose mothers received propranolol HCl during pregnancy.
In a series of reproductive and developmental toxicology studies, propranolol was given to rats by gavage or in the diet throughout pregnancy and lactation. At doses of 150 mg/kg/day, but not at doses of 80 mg/kg/day (equivalent to the maximum recommended human oral daily dose (MRHD) on a body surface area basis), treatment was associated with embryotoxicity (reduced litter size and increased resorption rates) as well as neonatal toxicity (deaths). Propranolol HCl was also administered (in the feed) to rabbits (throughout pregnancy and lactation) at doses as high as 150 mg/kg/day (about 5 times the MRHD). No evidence of embryo or neonatal toxicity was noted.
Labor And Delivery
Neonates whose mothers received propranolol HCl at parturition have exhibited bradycardia, hypoglycemia, and/or respiratory depression. Adequate facilities for monitoring such infants at birth should be available.
Propranolol is excreted in human milk.
Safety and effectiveness of propranolol in pediatric patients have not been established.
Clinical studies of INNOPRAN XL did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.
The exposure to propranolol is increased in patients with renal impairment. Initiate INNOPRAN XL therapy in patients with impaired renal function at the lowest dose (80 mg) once daily and monitor patients for marked bradycardia and hypotension [see CLINICAL PHARMACOLOGY].
The exposure to propranolol is increased in patients with hepatic impairment. Initiate INNOPRAN XL therapy in patients with impaired hepatic function at the lowest dose (80 mg) once daily and monitor patients for marked bradycardia and hypotension [see CLINICAL PHARMACOLOGY].
Last reviewed on RxList: 12/23/2013
This monograph has been modified to include the generic and brand name in many instances.
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