-epinephrine
-medicines for colds and breathing difficulties
-medicines for high blood pressure
-medicines used to treat erectile dysfunction (ED) like sildenafil, tadalafil, and vardenafil
-other alpha-blockers like alfuzosin, doxazosin, phentolamine, prazosin, tamsulosin, terazosin
-reserpine

They need to know if you have any of the following conditions:
-heart or circulation disease
-kidney disease
-shock
-stroke
-an unusual or allergic reaction to phenoxybenzamine, other medicines, foods, dyes, or preservatives
-pregnant or trying to get pregnant
-breast-feeding

Visit your doctor or health care professional for regular checks on your progress.

Drowsiness and dizziness are more 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 medicine. Do not drive, use machinery, or do anything that needs mental alertness until you know how this drug affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol can make you more drowsy and dizzy. Avoid alcoholic drinks.

Do not treat yourself for coughs, colds, or pain while you are taking this medicine without asking your doctor or health care professional for advice. Some ingredients 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 doctor if the problem does not go away or is severe.

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Keep container tightly closed. Throw away any unused medicine after the expiration date.