About doxazosin mesylate
Alpha-1 adrenergic blocker
Used for
- Treats high blood pressure.
- Relieves urinary symptoms from benign prostate enlargement.
Usual adult dose
High blood pressure: usually 1 mg once daily initially, adjusted gradually. Prostate symptoms: usually 1 mg once daily, increased gradually to 4–8 mg daily.
Common side effects
- Dizziness or light-headedness, especially when standing
- Low blood pressure or fainting
- Headache or tiredness
- Swelling of the legs
Important warnings
- The first dose or dose increases can cause sudden low blood pressure or fainting.
- Rise slowly from sitting or lying down; avoid driving if dizzy.
- Tell an eye surgeon about doxazosin before cataract surgery.
- It treats prostate symptoms but does not treat prostate cancer.
Pregnancy
Not generally used during pregnancy; safety is not well established.
Breastfeeding
Use during breastfeeding only if a clinician considers it necessary; information is limited.
Interactions
- Other blood-pressure medicines may increase low blood pressure.
- Erectile dysfunction medicines, such as sildenafil, may cause marked blood pressure reduction.
- Strong CYP3A4 inhibitors may increase doxazosin levels.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.