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You are here : 3-RX.com > Drugs & Medications > Quick Drug Information (DrugNotes) > Phenoxybenzamine (Oral)

Phenoxybenzamine (By Mouth)

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

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

Brand Name(s):

Dibenzyline
There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

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.

How to Use This Medicine:

Capsule

  • Your doctor will tell you how much medicine to use and how often.

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.
How to Store and Dispose of This Medicine:

  • Store the capsules at room temperature, away from heat, moisture, and direct light.
  • Keep all medicine out of the reach of children.
Drugs and Foods to Avoid:

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.
Warnings While Using This Medicine:

  • 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.
Possible Side Effects While Using This Medicine:

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

  • Fainting
  • Fast heartbeat
  • Vomiting

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

  • Feeling dizzy or drowsy
  • Stuffy nose
  • Stomach upset
  • Trouble having sex
  • Blurred vision
If you notice other side effects that you think are caused by this medicine, tell your doctor.


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