Drug reference
doxazosin
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Drug class
Genitourinary (Alpha-1 Blockers)
Mechanism of action
Blocks postsynaptic alpha1 receptors; alpha blockade causes arterial, arteriolar, and venous dilation; decreases total peripheral resistance and blood pressure. a non-specific selective alpha blocker; acts on blood vessels (lower blood pressure) and prostate (relax prostate and urethra muscles and relax bladder neck).
Common side effects
- Upper respiratory tract infection
- Dizziness
- Headache
- Fatigue
- Vertigo
Contraindications
- Hypersensitivity to doxazosin or other quinazolines
Known interactions (5)
- atenolol + doxazosin Moderate
- bisoprolol + doxazosin Moderate
- doxazosin + methyldopa Moderate
- doxazosin + nifedipine Moderate
- doxazosin + verapamil Moderate
Related conditions
Frequently asked questions
What drug class is doxazosin?
doxazosin belongs to: Genitourinary.
How does doxazosin work?
Blocks postsynaptic alpha1 receptors; alpha blockade causes arterial, arteriolar, and venous dilation; decreases total peripheral resistance and blood pressure. a non-specific selective alpha blocker; acts on blood vessels (lower blood pressure) and prostate (relax prostate and urethra muscles and relax bladder neck).
What are the common side effects of doxazosin?
Upper respiratory tract infection, Dizziness, Headache, Fatigue, Vertigo
Which drugs interact with doxazosin?
atenolol, bisoprolol, methyldopa, nifedipine, verapamil
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