Question 1

What is doxazosin?

Accepted Answer

Doxazosin is a quinazoline compound that is a selective inhibitor of the alpha 1 subtype of alpha-adrenergic receptors. The chemical name of Doxazosin is 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(1,4-benzodioxan-2-ylcarbonyl) piperazine methanesulfonate. The empirical formula for Doxazosin is C 23 H 25 N 5 O 5 ∙ CH 4 O 3 S and the molecular weight is 547.6. It has the following structure: Doxazosin is freely soluble in dimethylsulfoxide, soluble in dimethylformamide, slightly soluble in methanol, ethanol, and water (0.8% at 25°C), and very slightly soluble in acetone and methylene chloride. Doxazosin tablet is available as colored tablets for oral use and contains doxazosin mesylate equivalent to 1 mg (white), 2 mg (yellow or white), 4 mg (orange or white) and 8 mg (green or white) of doxazosin as the free base. The inactive ingredients for all tablets are microcrystalline cellulose, lactose, sodium starch glycolate, magnesium stearate and sodium lauryl sulfate. The 2 mg yellow tablet contains D & C yellow 10 and FD & C yellow 6; the 4 mg orange tablet contains FD & C yellow 6; the 8 mg green tablet contains FD & C blue 2 and D & C yellow 10. Chemical Structure

Question 2

What kind of drug is doxazosin?

Accepted Answer

The FDA classifies doxazosin as an alpha-adrenergic blocker. Alpha-adrenergic blockers block the alpha-1 receptors that adrenaline-like signals use to tighten muscle in blood vessels and the prostate. This relaxes those muscles, lowering blood pressure and easing urine flow in men with an enlarged prostate. If you are checking whether it is safe to combine with something else, the class is what matters — two drugs from the same class usually should not be stacked.

Question 3

Can you take doxazosin with other medicines?

Accepted Answer

It depends on the medicine. We check it against the FDA labels rather than guessing: our interaction checker searches each drug's own label for the other and quotes what it says, naming the section it came from. Run doxazosin against whatever else you take — and remember that a label not naming a drug is not the same as that combination being safe.

Question 4

What brand names is doxazosin sold under?

Accepted Answer

We track 3 doxazosin-containing products in the U.S.: Cardura, Cardura XL and Doxazosin Mesylate. They are the same active ingredient; they differ in form, manufacturer, price and FDA recall record.

Question 5

What forms does doxazosin come in?

Accepted Answer

Across the brands we track, doxazosin is currently marketed as tablet and tablet, extended release, per the FDA's National Drug Code Directory. Each form is dosed differently — follow the label for the exact product you were prescribed.

Question 6

Is there a generic doxazosin?

Accepted Answer

Yes. Our catalog lists 1 generic doxazosin product alongside the brand versions. A generic has the same active ingredient and must meet the FDA's bioequivalence standard; it usually costs less. Ask your pharmacist which one your plan covers.

Question 7

Has doxazosin been recalled?

Accepted Answer

The FDA's Enforcement database lists at least 5 recall records whose product description mentions doxazosin. The most recent: Doxazosin Tablets (Jan 21, 2026). A recall applies to specific lots, not to the drug as a whole — check the record for the affected lot numbers.

#	Drug	Rating	Type	Form	Generic?	Typical price
1	Cardura	68/100	Prescription	Tablet	Generic	$3	View →
2	Cardura XL	64/100	Prescription	Tablet	Generic

Doxazosin: uses, dosing, side effects & brands

Key facts

How doxazosin is dosed

Doxazosin side effects

Every doxazosin product we track (3)

What doxazosin pills look like

Doxazosin recalls

Frequently asked questions

Who shouldn’t take doxazosin

Doxazosin drug interactions

Imprint	Strength	Colour	Shape	Maker
AC;358	4 mg	white	round	—
596;TV	4 mg	white	diamond	—
593;TV	2 mg	white	oval	—
AC;358	4 mg	white	round	—
Cardura;1;mg	1 mg	white	oval	—
Cardura;2;mg	2 mg