Molecule Description

Terazosin is ‘Alpha-blocker’ medicine, which is used in Benign Prostatic Hyperpl...
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Uses of Terazosin

Benign Prostatic Hyperplasia in which it improves urination.

Contraindications of Terazosin

When should one not use Terazosin

  • Do not take this medicine if:
  • You are allergic to Terazosin or medicine similar to Terazosin such as Prazosin, Tamsulosin, Doxazosin
  • You have heart failure
  • You fall or faint during urination

Side effects of Terazosin

Common side effects of this drug are:

  • Dizziness
  • Breathing difficulty
  • Uneven heart rate
  • Fainting on standing position
  • Loose motions
  • Headache
  • Swelling of feet, hands, arms and legs
  • Sleepiness
  • Nervousness
  • Constipation
  • Rash or itching over skin
  • Chest pain
  • Blurred vision
  • Backache
  • Bleeding or blocked nose
  • Sinusitis

Precautions and Warnings of Terazosin


Can I take Terazosin during pregnancy?
This medicine is not prescribed to women as it is used to treat men’s medical condition.

Breast Feeding

Can I take Terazosin while breastfeeding?
This medicine is not prescribed to women as it is used to treat men’s medical condition.


Can I drive if I have consumed Terazosin?
Taking this medicine may make you feel weak or dizzy. Do not drive any vehicle if this happens to you.


Can I consume alcohol with Terazosin?
Taking alcohol with this medicine may lead to cause more weakness, drowsiness or dizziness.

Other General Warnings

Talk to your doctor if
  • You have an intolerance to lactose sugar
  • You have heart disease, liver disease or kidney disease
  • You are taking medicines for high blood pressure
  • You are taking medicines to treat erectile dysfunction, or impotence (Sildenafil, Tadalafil, Vardenafil)
  • You are on a salt-restricted diet
  • You are dehydrated
  • You have insulin-dependent diabetes, high blood pressure causing eye problems

Mode of Action of Terazosin

How Does It Work?

It relieves the symptoms of enlargement of the prostate gland by relaxing the muscles of the bladder and prostate.

Interactions of Terazosin

Interactions with other medicines

  • Medicines which may lead to interact with Terazosin including other Alpha-blocker medicines like Prazosin, Tamsulosin are as under
  • Medicines used to treat erectile dysfunction (Sildenafil, Tadalafil)
  • Medicines used in high blood pressure
  • I-azole antifungals (Itraconazole, Ketoconazole)
  • Macrolide antibiotics (Clarithromycin)
  • Protease inhibitor use in HIV (Lopinavir, Ritonavir)

Interactions with food items

No information is available on interactions of Terazosin when taken with food, consult your doctor or pharmacist for further details.

Dietary Restrictions of Terazosin

No information is available on dietary restrictions while you are taking this medicine, consult your doctor or pharmacist for further details.

Dosage of Terazosin


An overdose of Terazosin may be harmful. Overdose symptoms may include drowsiness, dizziness, lightheadedness, weakness, fainting, etc.

Missed a Dose

Take the missed dose as early as you remember. If the time for the next dose is close, skip the missed dose & do not take extra medicine to compensate for the missed dose.

Content Details


Dr. Ritu Budania

MBBS, MD (Pharmacology)

Frequently Asked Questions (FAQs)


Q: What should I discuss with my healthcare expert before taking this medicine?

A: You should not use this medicine if you are allergic to it or have certain medical conditions, as mentioned. Give a detailed account of your medical and surgical history. Also, refer to your doctor all the prescription and non-prescription medicines, herbal preparations and nutritional supplements that you may be taking before starting this medication.

Q: I consumed more medicine by mistake and I feel faint, what to do?

A: Don't panic. Lie down on your back and raise your legs in the air. After some time, you will feel better.
Last Updated on: 05 Oct 2020 | 10:47 PM (IST)

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