Skip to main content

Carduran Side Effects

Generic name: doxazosin

Medically reviewed by Drugs.com. Last updated on Mar 29, 2024.

Note: This document contains side effect information about doxazosin. Some dosage forms listed on this page may not apply to the brand name Carduran.

Applies to doxazosin: oral tablet, oral tablet extended release.

Serious side effects of Carduran

Along with its needed effects, doxazosin (the active ingredient contained in Carduran) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor as soon as possible if any of the following side effects occur while taking doxazosin:

More common

Less common

Rare

Incidence not known

Other side effects of Carduran

Some side effects of doxazosin may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

Less common

Incidence not known

For Healthcare Professionals

Applies to doxazosin: oral tablet, oral tablet extended release.

General

The most common adverse reaction was dizziness.[Ref]

Nervous system

Very common (10% or more): Dizziness (up to 19%)

Common (1% to 10%): Somnolence, headache, vertigo

Uncommon (0.1% to 1%): Cerebrovascular accident, hypoesthesia, syncope, tremor, tinnitus

Very rare (less than 0.01%): Dizziness postural, paresthesia

Frequency not reported: Taste disturbance[Ref]

Other

Very common (10% or more): Fatigue/malaise (12%)

Common (1% to 10%): Asthenia, chest pain, influenza-like symptoms

Uncommon (0.1% to 1%): Pain, facial edema[Ref]

Respiratory

Common (1% to 10%): Dyspnea, rhinitis, respiratory tract infection, bronchitis, cough

Uncommon (0.1% to 1%): Epistaxis

Very rare (less than 0.01%): Bronchospasm

Postmarketing reports: Bronchospasm aggravated[Ref]

Gastrointestinal

Common (1% to 10%): Dry mouth, abdominal pain, dyspepsia, nausea

Uncommon (0.1% to 1%): Constipation, flatulence, vomiting, gastroenteritis, diarrhea

Frequency not reported: Gastrointestinal obstruction[Ref]

Genitourinary

Common (1% to 10%): Polyuria, urinary tract infection, cystitis, urinary incontinence

Uncommon (0.1% to 1%): Dysuria, micturition frequency, hematuria, impotence

Very rare (less than 0.01%): Micturition disorder, nocturia, priapism

Frequency not reported: Retrograde ejaculation[Ref]

Cardiovascular

Common (1% to 10%): Hypotension, postural hypotension, palpitation, tachycardia

Uncommon (0.1% to 1%): Angina pectoris, myocardial infarction

Very rare (less than 0.01%): Bradycardia, cardiac arrhythmias, hot flushes[Ref]

Metabolic

Common (1% to 10%): Edema, peripheral edema

Uncommon (0.1% to 1%): Gout, appetite increased, anorexia, weight increased[Ref]

Musculoskeletal

Common (1% to 10%): Myalgia, back pain

Uncommon (0.1% to 1%): Arthralgia

Rare (less than 0.1%): Muscle cramps, muscle weakness[Ref]

Dermatologic

Common (1% to 10%): Pruritus

Uncommon (0.1% to 1%): Skin rash

Very rare (less than 0.01%): Urticaria, purpura, alopecia[Ref]

Psychiatric

Uncommon (0.1% to 1%): Agitation, depression, anxiety, insomnia, nervousness

Frequency not reported: Libido decreased[Ref]

Hepatic

Uncommon (0.1% to 1%): Abnormal liver function tests

Very rare (less than 0.01%): Cholestasis, hepatitis, jaundice

Postmarketing reports: Hepatitis cholestatic[Ref]

Immunologic

Uncommon (0.1% to 1%): Allergic drug reaction

Postmarketing reports: Allergic reaction[Ref]

Hematologic

Very rare (less than 0.01%): Leukopenia, thrombocytopenia

Frequency not reported: White blood cell counts decreased, neutrophil count decreased[Ref]

Ocular

Very rare (less than 0.01%): Blurred vision

Frequency not reported: Intraoperative Floppy Iris Syndrome (IFIS)[Ref]

Endocrine

Very rare (less than 0.01%): Gynecomastia[Ref]

Renal

Very rare (less than 0.01%): Diuresis increased[Ref]

References

1. Product Information. Cardura (doxazosin). Pfizer U.S. Pharmaceuticals. 2001;PROD.

2. Cerner Multum, Inc. UK Summary of Product Characteristics.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.