If you experience any of the following serious side effects, stop taking phendimetrazine and seek emergency medical attention:

an allergic reaction (difficulty breathing, closing of your throat, swelling of your lips, tongue, or face, or hives)
an irregular heartbeat or very high blood pressure (severe headache, blurred vision)
hallucinations
abnormal behavior
confusion

Other, less serious side effects may be more likely to occur. Continue to take phendimetrazine and talk to your doctor if you experience:

restlessness or tremor
nervousness or anxiety
headache or dizziness
insomnia
dry mouth or an unpleasant taste in your mouth
diarrhea or constipation
impotence or changes in your sex drive

NOTE: Phendimetrazine is habit forming. You can become physically and psychologically dependent on this medication, and withdrawal effects may occur if you stop taking it suddenly after several weeks of continuous use. Talk to your doctor about stopping this medication gradually.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

 

FDA Information

Why is this medication prescribed?

Other uses for this medicine

Dosage and using this medicine

What special precautions should I follow?

What should I do if I forget a dose?

What storage conditions are needed for this medicine?

In case of an emergency/overdose