Dibenzyline is used to control blood pressure and reduce sweating in people with pheochromocytoma (tumor of the adrenal gland).

Dibenzyline may also be used for purposes not listed in this medication guide.

Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.

Follow all directions on your prescription label and read all medication guides or instruction sheets. Your doctor may occasionally change your dose. Use the medicine exactly as directed.

Call your doctor if you have fast heartbeats. You may need to be treated with an additional medication.

Store Dibenzyline at room temperature away from moisture and heat.

You should not use Dibenzyline if you are allergic to it.

Tell your doctor if you have ever had:

• coronary artery disease (hardened arteries);

• a lung infection; or

• kidney disease.

Tell your doctor if you are pregnant.

You should not breastfeed while using Dibenzyline.

Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include fast heart rate, vomiting, dizziness, or fainting.

Avoid driving or hazardous activity until you know how Dibenzyline will affect you. Your reactions could be impaired.

Avoid getting up too fast from a sitting or lying position, or you may feel dizzy.

Drinking alcohol with this medicine can cause side effects.

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

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

Common side effects of Dibenzyline 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.

Tell your doctor about all your other medicines, especially:

• reserpine;

• tizanidine;

• epinephrine (Epi-Pen), norepinephrine; or

• blood pressure medications.

This list is not complete. Other drugs may affect Dibenzyline, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.