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What are side effects of alpha blockers?

Dr. Marc B. Garnick, MD
Hematologist & Oncologist

Some men on alpha blockers experience dizziness, lack of energy, swelling of the ankles, or retrograde ejaculation, which occurs when semen flows back into the bladder rather than out through the penis upon orgasm. You may need to make several visits to your doctor and try several prescriptions to arrive at the appropriate medication and the right dose.

Donna Hill Howes, RN
Family Practitioner

Side effects may include headaches, drowsiness, weakness, fainting, nasal congestion, and nausea. Other side effects may include frequent urination or loss of bladder control, and a rapid, strong, or irregular heartbeat. Alpha blockers can make it dangerous to drive or to operate machinery.

This answer was adapted from Sharecare's award-winning AskMD app. Start a consultation now to find out what's causing your symptoms, learn how to manage a condition, or find a doctor.

The side effects for alpha blockers (very potent medications often used for people whose blood pressure doesn't respond to less strong drugs) are mostly about headaches, and about weight gain and heart failure.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.