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Atacand HCT

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Atacand HCT

Atacand HCT Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Atacand HCT (candesartan cilexetil - hydrochlorothiazide) Tablets is a thiazide diuretic used to treat high blood pressure. It is available in generic form. Common side effects of Atacand HCT include stomach pain, back pain, dizziness, drowsiness, headache, runny nose, sore throat, and dry cough.

The recommended dosage of Atacand HCT is 16 mg once daily. Other diuretics, steroids, lithium, insulin, barbiturates, aspirin, ibuprofen, muscle relaxers, and narcotics may interact with Atacand HCT. Tell your doctor all medications you take. Before taking Atacand HCT tell your doctor if you have kidney or liver disease, congestive heart failure, glaucoma, low or high levels of potassium in your blood, asthma or allergies, high cholesterol or triglycerides, gout, lupus, or diabetes. Do not take Atacand HCT if you are pregnant or breastfeeding.

Our Atacand HCT (candesartan cilexetil - hydrochlorothiazide) Tablets Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is Patient Information in Detail?

Easy-to-read and understand detailed drug information and pill images for the patient or caregiver from Cerner Multum.

Atacand HCT in Detail - Patient Information: Side Effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

In rare cases, hydrochlorothiazide and candesartan can cause a condition that results in the breakdown of skeletal muscle tissue, leading to kidney failure. Call your doctor right away if you have unexplained muscle pain, tenderness, or weakness especially if you also have fever, unusual tiredness, and dark colored urine.

Call your doctor at once if you have any other serious side effect, such as:

  • eye pain, vision problems;
  • feeling like you might pass out;
  • chest pain, feeling short of breath, even with mild exertion;
  • fever;
  • swelling, rapid weight gain;
  • urinating less than usual or not at all;
  • jaundice (yellowing of the skin or eyes); or
  • dry mouth, increased thirst, drowsiness, restless feeling, confusion, increased urination, fast heart rate, feeling light-headed, fainting, or seizure (convulsions).

Less serious side effects may include:

  • stomach pain;
  • back pain;
  • dizziness, drowsiness;
  • headache;
  • runny or stuffy nose, sore throat; or
  • dry cough.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Atacand HCT (Candesartan Cilexetil-Hydrochlorothiazide) »

What is Patient Information Overview?

A concise overview of the drug for the patient or caregiver from First DataBank.

Atacand HCT Overview - Patient Information: Side Effects

SIDE EFFECTS: Dizziness and lightheadedness may occur as your body adjusts to the medication. If either of these effects persists or worsens, tell your doctor or pharmacist promptly.

To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.

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.

This product may cause a loss of too much body water (dehydration) and salt/minerals. Tell your doctor right away if you have any symptoms of dehydration or mineral loss, including: extreme thirst, very dry mouth, muscle cramps/weakness, fast/slow/irregular heartbeat, confusion, decreased urination.

Tell your doctor right away if you have any serious side effects, including: fainting, unusual change in the amount of urine (not including the normal increase in urine when you first start this drug), toe/joint pain, symptoms of a high potassium blood level (such as muscle weakness, slow/irregular heartbeat), decrease in vision, eye pain.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), 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.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Read the entire patient information overview for Atacand HCT (Candesartan Cilexetil-Hydrochlorothiazide)»

What is Prescribing information?

The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.

Atacand HCT FDA Prescribing Information: Side Effects
(Adverse Reactions)


Candesartan Cilexetil-Hydrochlorothiazide

ATACAND HCT has been evaluated for safety in more than 2800 patients treated for hypertension. More than 750 of these patients were studied for at least six months and more than 500 patients were treated for at least one year. Adverse experiences have generally been mild and transient in nature and have only infrequently required discontinuation of therapy. The overall incidence of adverse events reported with ATACAND HCT was comparable to placebo. The overall frequency of adverse experiences was not related to dose, age, gender, or race.

In placebo-controlled trials that included 1089 patients treated with various combinations of candesartan cilexetil (doses of 232 mg) and hydrochlorothiazide (doses of 6.25-25 mg) and 592 patients treated with placebo, adverse events, whether or not attributed to treatment, occurring in greater than 2% of patients treated with ATACAND HCT and that were more frequent for ATACAND HCT than placebo were: Respiratory System Disorder: upper respiratory tract infection (3.6% vs 3.0%); Body as a Whole: back pain (3.3% vs 2.4%); influenza-like symptoms (2.5% vs 1.9%); Central/Peripheral Nervous System: dizziness (2.9% vs 1.2%).

The frequency of headache was greater than 2% (2.9%) in patients treated with ATACAND HCT but was less frequent than the rate in patients treated with placebo (5.2%).

Other adverse events that have been reported, whether or not attributed to treatment, with an incidence of 0.5% or greater from the more than 2800 patients worldwide treated with ATACAND HCT included: Body as a Whole: inflicted injury, fatigue, pain, chest pain, peripheral edema, asthenia; Central and Peripheral Nervous System: vertigo, paresthesia, hypesthesia; Respiratory System Disorders: bronchitis, sinusitis, pharyngitis, coughing, rhinitis, dyspnea; Musculoskeletal System Disorders: arthralgia, myalgia, arthrosis, arthritis, leg cramps, sciatica; Gastrointestinal System Disorders: nausea, abdominal pain, diarrhea, dyspepsia, gastritis, gastroenteritis, vomiting; Metabolic and Nutritional Disorders: hyperuricemia, hyperglycemia, hypokalemia, increased BUN, creatine phosphokinase increased; Urinary System Disorders: urinary tract infection, hematuria, cystitis; Liver/Biliary System Disorders: hepatic function abnormal, increased transaminase levels; Heart Rate and Rhythm Disorders: tachycardia, palpitation, extrasystoles, bradycardia; Psychiatric Disorders: depression, insomnia, anxiety; Cardiovascular Disorders: ECG abnormal; Skin and Appendages Disorders: eczema, sweating increased, pruritus, dermatitis, rash; Platelet/Bleeding-Clotting Disorders: epistaxis; Resistance Mechanism Disorders: infection, viral infection; Vision Disorders: conjunctivitis; Hearing and Vestibular Disorders: tinnitus.

Reported events seen less frequently than 0.5% included angina pectoris, myocardial infarction and angioedema.

Candesartan Cilexetil

Other adverse experiences that have been reported with candesartan cilexetil, without regard to causality, were: Body as a Whole: fever; Metabolic and Nutritional Disorders: hypertriglyceridemia; Psychiatric Disorders: somnolence; Urinary System Disorders: albuminuria.

Post-Marketing Experience

The following have been very rarely reported in post-marketing experience with candesartan cilexetil:

Digestive: Abnormal hepatic function and hepatitis.

Hematologic: Neutropenia, leukopenia, and agranulocytosis.

Metabolic and Nutritional Disorders: hyperkalemia, hyponatremia.

Renal: renal impairment, renal failure.

Skin and Appendages Disorders: Pruritus and urticaria.

Rare reports of rhabdomyolysis have been reported in patients receiving angiotensin II receptor blockers.


Other adverse experiences that have been reported with hydrochlorothiazide, without regard to causality, are listed below:

Body As A Whole: weakness; Cardiovascular: hypotension including orthostatic hypotension (may be aggravated by alcohol, barbiturates, narcotics or antihypertensive drugs); Digestive: pancreatitis, jaundice (intrahepatic cholestatic jaundice), sialadenitis, cramping, constipation, gastric irritation, anorexia; Hematologic: aplastic anemia, agranulocytosis, leukopenia, hemolytic anemia, thrombocytopenia; Hypersensitivity: anaphylactic reactions, necrotizing angiitis (vasculitis and cutaneous vasculitis), respiratory distress including pneumonitis and pulmonary edema, photosensitivity, urticaria, purpura; Metabolic: electrolyte imbalance, glycosuria; Musculoskeletal: muscle spasm; Nervous System/Psychiatric: restlessness; Renal: renal failure, renal dysfunction, interstitial nephritis; Skin: erythema multiforme including Stevens-Johnson syndrome, exfoliative dermatitis including toxic epidermal necrolysis, alopecia; Special Senses: transient blurred vision, xanthopsia; Urogenital: impotence.

Laboratory Test Findings

In controlled clinical trials, clinically important changes in standard laboratory parameters were rarely associated with the administration of ATACAND HCT.

Creatinine, Blood Urea Nitrogen - Minor increases in blood urea nitrogen (BUN) and serum creatinine were observed infrequently. One patient was discontinued from ATACAND HCT due to increased BUN. No patient was discontinued due to an increase in serum creatinine.

Hemoglobin and Hematocrit - Small decreases in hemoglobin and hematocrit (mean decreases of approximately 0.2 g/dL and 0.4 volume percent, respectively) were observed in patients treated with ATACAND HCT, but were rarely of clinical importance.

Potassium - A small decrease (mean decrease of 0.1 mEq/L) was observed in patients treated with ATACAND HCT. In placebo-controlled trials, hypokalemia was reported in 0.4% of patients treated with ATACAND HCT as compared to 1.0% of patients treated with hydrochlorothiazide or 0.2% of patients treated with placebo.

Liver Function Tests - Occasional elevations of liver enzymes and/or serum bilirubin have occurred.

Read the entire FDA prescribing information for Atacand HCT (Candesartan Cilexetil-Hydrochlorothiazide) »


Atacand HCT - User Reviews

Atacand HCT User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Atacand HCT sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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