Cardura contains the active ingredient doxazosin mesylate, which is a selective inhibitor of alpha-adrenergic receptors. The medication is available in tablet form for oral administration with dosages of 1 mg, 2 mg, 4 mg, and 8 mg. Key inactive ingredients include croscarmellose sodium, lactose monohydrate, magnesium stearate, and microcrystalline cellulose.

How should I use this medication?

Take this medication by mouth. Take it as directed on the prescription label at the same time every day. You can take it with or without food. If it upsets your stomach, take it with food. Keep taking it unless your care team tells you to stop. Talk to your care team about the use of this medication in children. Special care may be needed.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once. NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

Where should I keep my medication?

Keep out of the reach of children and pets. Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Throw away any unused medication after the expiration date.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible: -Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat -Chest pain (angina)—pain, pressure, or tightness in the chest, neck, back, or arms -Low blood pressure—dizziness, feeling faint or lightheaded, blurry vision -Prolonged or painful erection Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome): -Dizziness -Fatigue -Headache

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What should I tell my care team before I take this medication?

They need to know if you have any of the following conditions: -Having eye surgery -Liver disease -Low blood pressure -Prostate cancer -Stomach or intestine problems -An unusual or allergic reaction to doxazosin, other medications, foods, dyes, or preservatives -Pregnant or trying to get pregnant -Breast-feeding

What may interact with this medication?

This medication may interact with the following: -Cimetidine -Medications for colds or hay fever -Medications for overactive bladder -Sildenafil -Tadalafil -Vardenafil

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medication?

Visit your care team for regular checks on your progress. Check your blood pressure as directed. Know what your blood pressure should be and when to contact your care team. This medication may affect your coordination, reaction time, or judgment which is likely to occur after the first dose, after an increase in dose, or during hot weather or exercise. These effects can decrease once your body adjusts to this medication. Do not drive or operate machinery until you know how this medication affects you. Sit up or stand slowly to reduce the risk of dizzy or fainting spells. Drinking alcohol with this medication can increase the risk of these side effects. Do not treat yourself for coughs, colds, or pain while you are taking this medication without asking your care team for advice. Some medications may increase your blood pressure. Your mouth may get dry. Chewing sugarless gum or sucking hard candy and drinking plenty of water may help. Contact your care team if the problem does not go away or is severe. If you are going to have eye surgery for cataracts, tell your care team you are taking this medication. A condition called Intraoperative Floppy Iris Syndrome (IFIS) can happen if you have taken this medication. Contact your care team right away if you have an erection that lasts longer than 4 hours or if it becomes painful. This may be a sign of a serious problem and must be treated right away to prevent permanent damage.