Phenoxybenzamine belongs to a class of medicines called antihypertensives

Take this medication by mouth as directed. Your dose may be increased gradually every few days until the desired effect is obtained. Follow dosing instructions closely. Always consult your doctor before use

SIDE EFFECTS: Stomach upset, nasal congestion, drowsiness, dizziness, weakness, constricted pupils, inhibition of ejaculation may occur. These effects should subside as your body adjusts to the medication. If they continue or become bothersome, inform your doctor. Notify your doctor if you develop: a rapid or pounding heartbeat, fainting, vomiting, unusual weakness. Males - though it is unlikely to occur, if you get a painful, prolonged erection, stop using this drug and seek immediate medical attention. This medication may cause dizziness or drowsiness. Use caution engaging in activities requiring alertness. Move from a lying to standing position slowly and be careful on stairs. If you notice other effects not listed above, contact your doctor or pharmacist.

your doctor of any over-the-counter or prescription medication you may take, especially of: high blood pressure drugs, drugs for coughs/colds/allergies. Avoid intake of alcohol or other sedating type medications to prevent excessive drowsiness and dizziness. Do not start or stop any medicine without doctor or pharmacist approval.

If you suspect an overdose call the emergency department or your doctor immediately.

If you miss a dose, take it as soon as remembered; do not take it if it is near the time for the next dose, instead, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.

This medication is used to treat symptoms of pheochromocytoma such as high blood pressure and excess sweating. Phenoxybenzamine may also be used to treat urinary problems in men who have certain prostate conditions.

Store at room temperature between 59 and 86 degrees F (15 and 30 degrees C) away from heat and light. Do not store in the bathroom.

Tell your doctor if you have: other pre-existing illnesses, allergies. This medication should be used only if clearly needed during pregnancy. Discuss the risks and benefits with your doctor. Since small amounts of this medication are found in breast milk, consult your doctor before breast-feeding.