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Terazosin Side Effects

In Summary

Commonly reported side effects of terazosin include: dizziness. Other side effects include: asthenia, headache, and peripheral edema. See below for a comprehensive list of adverse effects.

For the Consumer

Applies to terazosin: oral capsule

Along with its needed effects, terazosin 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 terazosin:

More Common

Less Common

  • Chest pain
  • dizziness or lightheadedness when getting up from a lying or sitting position
  • fainting (sudden)
  • fast or irregular heartbeat
  • pounding heartbeat
  • shortness of breath
  • swelling of feet or lower legs

Rare

  • Weight gain

Some side effects of terazosin 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

  • Headache
  • unusual tiredness or weakness

Less Common

For Healthcare Professionals

Applies to terazosin: oral capsule, oral tablet

General

Asthenia, blurred vision, dizziness, impotence, nasal congestion/rhinitis, nausea, somnolence, palpitations, peripheral edema, and postural hypotension were significantly more common (p-value less than or equal to 0.05) in patients receiving this drug than in patients receiving placebo.[Ref]

Nervous system

Very common (10% or more): Dizziness (up to 19.3%), headache (up to 16.2%)

Common (1% to 10%): Syncope, somnolence, paresthesia[Ref]

Other

Very common (10% or more): Asthenia (up to 11.3%)

Common (1% to 10%): Flu syndrome, vertigo, peripheral edema

Uncommon (0.1% to 1%): Edema

Frequency not reported: Chest pain, facial edema, fever, cold symptoms, flu symptoms, tinnitus[Ref]

Cardiovascular

Common (1% to 10%): Postural hypotension, palpitations, tachycardia

Uncommon (0.1% to 1%): Hypotension

Frequency not reported: Arrhythmia, vasodilation

Postmarketing reports: Atrial fibrillation[Ref]

Respiratory

Common (1% to 10%): Dyspnea, nasal congestion/rhinitis, sinusitis

Frequency not reported: Bronchitis, epistaxis, cough increased, pharyngitis[Ref]

Musculoskeletal

Common (1% to 10%): Back pain, pain-extremities

Frequency not reported: Neck pain, shoulder pain, arthralgia, arthritis, joint disorder, myalgia[Ref]

Genitourinary

Common (1% to 10%): Impotence, urinary tract infection

Frequency not reported: Urinary frequency, urinary incontinence

Postmarketing reports: Priapism[Ref]

Psychiatric

Common (1% to 10%): Nervousness

Uncommon (0.1% to 1%): Depression, libido decreased

Frequency not reported: Anxiety, insomnia[Ref]

Gastrointestinal

Common (1% to 10%): Nausea

Frequency not reported: Abdominal pain, constipation, diarrhea, dry mouth, dyspepsia, flatulence, vomiting[Ref]

Ocular

Common (1% to 10%): Blurred vision/amblyopia

Frequency not reported: Vision abnormal, conjunctivitis[Ref]

Metabolic

Uncommon (0.1% to 1%): Weight gain

Frequency not reported: Gout[Ref]

Dermatologic

Frequency not reported: Pruritus, rash, sweating[Ref]

Immunologic

Postmarketing reports: Allergic reactions, anaphylaxis[Ref]

Hematologic

Postmarketing reports: Thrombocytopenia[Ref]

References

1. "Product Information. Hytrin (terazosin)." Abbott Pharmaceutical, Abbott Park, IL.

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.

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