Serious side effects from Tenuate are not common. But as your body adjusts to the new medication, you might have some of the following effects for the first few days.

• dry mouth or an unpleasant taste in your mouth
• bowel problems such as diarrhea or constipation
• vomiting or other stomach upset
• drowsiness

If you have any symptoms that last longer than a few days, call your doctor.

The symptoms listed below are more serious. If you have them, call your doctor right away:

• increase in your blood pressure
• palpitations (skipped beats) in your heartbeat
• restlessness
• dizziness
• tremors
• difficulty sleeping
• swelling in your legs or ankles

Sometimes, adjusting the dosage is enough to make side effects taper off or go away altogether.