Terazosin Side Effects

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

Applies to terazosin: oral capsule.

Serious side effects of terazosin

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

• dizziness

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

Other side effects of terazosin

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

• back or joint pain
• blurred vision
• drowsiness
• nausea and vomiting
• stuffy nose

For healthcare professionals

Applies to terazosin: oral capsule, oral liquid, 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]

Further information

Terazosin side effects can vary depending on the individual. 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.

Medical Disclaimer