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Dibenzyline

Last reviewed on RxList: 5/14/2008
Dibenzyline Side Effects Center

Last reviewed on RxList 3/5/2016

Dibenzyline (phenoxybenzamine) is an alpha-blocker, which helps lower blood pressure, used control blood pressure and reduce sweating in people with pheochromocytoma. Common side effects of Dibenzyline include stomach upset, nausea, stuffy nose, drowsiness, dizziness, decrease in pupil size, blurred vision, trouble having an orgasm, or tired feeling.

The starting dose of Dibenzyline is 10 mg twice a day. Dosage should be increased every other day, usually to 20 to 40 mg 2 or 3 times a day, until an optimal dosage is obtained, as judged by blood pressure control. Dibenzyline may interact with reserpine, tizanidine, epinephrine, norepinephrine, or blood pressure medications. Tell your doctor all medications and supplements you use. During pregnancy, Dibenzyline should be used only when prescribed. It is unknown if this drug passes into breast milk. Consult your doctor before breastfeeding.

Our Dibenzyline (phenoxybenzamine) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Dibenzyline Consumer Information

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using phenoxybenzamine and call your doctor at once if you severe dizziness or if you feel like you might pass out.

Less serious side effects may include:

  • stuffy nose;
  • mild dizziness or drowsiness;
  • blurred vision;
  • trouble having an orgasm;
  • upset stomach; or
  • tired feeling.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Dibenzyline (Phenoxybenzamine)

Dibenzyline Professional Information

SIDE EFFECTS

The following adverse reactions have been observed, but there are insufficient data to support an estimate of their frequency.

Autonomic Nervous System*: Postural hypotension, tachycardia, inhibition of ejaculation, nasal congestion, miosis.

*These so-called "side effects" are actually evidence of adrenergic blockade and vary according to the degree of blockade.

Miscellaneous: Gastrointestinal irritation, drowsiness, fatigue.

Read the entire FDA prescribing information for Dibenzyline (Phenoxybenzamine)

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© Dibenzyline Patient Information is supplied by Cerner Multum, Inc. and Dibenzyline Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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