Hytrin Side Effects

Generic name: terazosin

Medically reviewed by Drugs.com. Last updated on Mar 31, 2025.

Note: This document provides detailed information about Hytrin Side Effects associated with terazosin. Some dosage forms listed on this page may not apply specifically to the brand name Hytrin.

Applies to terazosin: oral capsule.

Serious side effects of Hytrin

Along with its needed effects, terazosin (the active ingredient contained in Hytrin) 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 side effects

• dizziness

Less common side effects

• 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 side effects

• weight gain

Other side effects of Hytrin

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 side effects

• headache
• unusual tiredness or weakness

Less common side effects

• 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 adverse events

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

Hytrin 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.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer