Phenoxybenzamine (By mouth)
fen-ox-ee-BEN-za-meen
Treats high blood pressure and sweating caused by pheochromocytoma.
Drug classes
Cardiovascular Agent (About this – PubMed Health)
Uses
Uses of This Medicine
Phenoxybenzamine belongs to the general class of medicines called antihypertensives. It is used to treat high blood pressure (hypertension) due to a disease called pheochromocytoma.
Phenoxybenzamine blocks the effects of certain chemicals in the body. When these chemicals are present in large amounts, they cause high blood pressure.
Phenoxybenzamine may also be used for other conditions as determined by your doctor.
Phenoxybenzamine is available only with your doctor’s prescription.
Once a medicine has been approved for marketing for a certain use, experience may show that it is also useful for other medical problems. Although this use is not included in product labeling, phenoxybenzamine is used in certain patients with the following medical condition:
Benign prostatic hypertrophy
Other uses (PubMed Health)
How To Use
Capsule
Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.
Missed dose:Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Some medicines can affect how phenoxybenzamine works. Tell your doctor if you are using diet pills or medicine to treat colds, hay fever, or a stuffy nose.
When Not To Use
This medicine is not right for everyone. Do not use it if you had an allergic reaction to phenoxybenzamine, or if you have a condition that could be worsened by very low blood pressure.
Warnings
Tell your doctor if you are pregnant or breastfeeding, or if you have heart disease, chest pain (angina), blood vessel disease, a lung infection, or kidney disease.
This medicine may make you dizzy or drowsy. Do not drive, use machines, or do anything else that may be dangerous until you know how this medicine affects you.
Dizziness may be worse when you stand up quickly. It may help to rise slowly from a sitting or lying position.
This medicine is not for long-term use.
Keep all medicine out of the reach of children. Never share your medicine with anyone.
Possible side effects
Summary More details
Call your doctor right away if you notice any of these side effects:
Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
Fainting
Fast heartbeat
If you notice these less serious side effects, talk with your doctor:
Blurred vision
Stuffy nose
Tiredness or drowsiness
Trouble with ejaculation
If you notice other side effects that you think are caused by this medicine, tell your doctor.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
More side effects of this drug
Brand names include
Dibenzyline
There may be other brand names for this medicine.
