Phenoxybenzamine (Oral) (Dibenzyline) - Drugs Information, Side Effects, & Interactions

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Phenoxybenzamine (fen-ox-ee-BEN-za-meen)

Treats high blood pressure caused by pheochromocytoma. Belongs to a class of drugs called alpha blockers.

Dibenzyline
There may be other brand names for this medicine.

You should not use this medicine if you have had an allergic reaction to phenoxybenzamine or if you have problems caused by very low blood pressure.

Capsule

If a dose is missed:

Use the missed dose as soon as possible, unless it is almost time for your next dose.
Skip the missed does if it is almost time for your next regular dose.
You should not use two doses at the same time.

Store the capsules at room temperature, away from heat, moisture, and direct light.
Keep all medicine out of the reach of children.

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

Tell your doctor if you are using diet pills or medicine to treat colds, hayfever, or a stuffy nose.

Talk with your doctor before using this medicine if you have heart disease, chest pain (angina), blocked blood vessels, a lung infection, or kidney disease.
If you are pregnant or breastfeeding, talk to your doctor before using this medicine.
This medicine may make you dizzy or drowsy. Avoid driving or using machinery until you know how the medicine will affect you.
Dizziness may be worse when you stand up too fast after you have been sitting or lying down. Getting up slowly from a sitting or lying position may help decrease dizziness. If you start to feel faint or dizzy, sit or lie down.

Call your doctor right away if you notice any of these side effects:

If you notice these less serious side effects, talk with your doctor:

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