"What are beta blockers?
The class of drugs called beta blockers were given their name because this class of medications counteracts the stimulatory effects of epinephrine (adrenaline) on the so-called beta-adrenergic receptors found"...
Clinical Trials Experience
Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice.
BiDil has been evaluated for safety in 517 heart failure patients in A-HeFT. A total of 317 of these patients received BiDil for at least 6 months, and 220 received BiDil for at least 12 months. In A-HeFT, 21% of the patients discontinued BiDil for adverse reactions compared to 12% who discontinued placebo. Overall, adverse reactions were more common in BiDil -treated than in placebo-treated patients. Table 1 lists adverse reactions reported with an incidence, after rounding, ≥ 2% higher on BiDil than on placebo in A-HeFT, regardless of causality. The most common reasons for discontinuing BiDil in the A-HeFT trial was headache (7%).
Table 1: Advers e Reactions Occurring in the A-HeFT Study
in ≥ 2% of Patients Treated with BiDil.
In the V-HeFT I and II clinical studies, a total of 587 patients with heart failure were treated with the combination of isosorbide dinitrate and hydralazine hydrochloride. The type, pattern, frequency and severity of adverse reactions reported in these studies were similar to those reported in A-HeFT, described above and no unusual adverse reactions were reported.
The following adverse reactions have been identified during post-approval use of BiDil. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
Use Of BiDil
The following adverse reactions have been identified with use of BiDil.
Cardiac Disorders: Palpitations
Eye Disorders: Eyelid edema, vision blurred
Gastrointestinal Disorders: Abdominal discomfort, constipation
General Disorders and Administration Site Conditions: Facial pain, flushing, chest discomfort, chest pain, peripheral edema
Musculoskeletal and Connective Tissue Disorders: Pain in extremity, myalgia
Nervous Disorders: Dysgeusia, hypoaesthesia, migraine, syncope
Renal and Urinary Disorders: Chromaturia, pulmonary renal syndrome
Respiratory, Thoracic and Mediastinal Disorders: Dyspnea
Reproductive System and Breast Disorders: Erectile dysfunction
Skin and Subcutaneous Tissue Disorders: Erythema, hyperhidrosis, pruritus, face swelling
Use of Hydralazine Hydrochloride or Isosorbide Dinitrate: The following reactions have been reported with use of either hydralazine hydrochloride or isosorbide dinitrate.
Read the BiDil (isosorbide dinitrate and hydralazine hcl) Side Effects Center for a complete guide to possible side effects
BiDil is contraindicated in patients who are using a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5), PDE5 inhibitors such as avanafil, sildenafil, vardenafil, and tadalafil have been shown to potentiate the hypotensive effects of organic nitrates. Do not use BiDil in patients who are taking the soluble guanylate cyclase (sGC) stimulator riociguat. Comcomitant use can cause hypotension [see CONTRAINDICATIONS].
Read the BiDil Drug Interactions Center for a complete guide to possible interactions
Last reviewed on RxList: 5/27/2016
Additional BiDil Information
BiDil - User Reviews
BiDil User Reviews
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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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