Do not take it more often or longer than directed. Dry mouth, sleeplessness, irritability, stomach upset or constipation may occur the first few days as your body adjusts to the phentermine medication. If these effects persist or become bothersome, inform your doctor. Tell your doctor your complete medical history especially if you have high blood pressure, an over-active thyroid, glaucoma, diabetes or emotional problems. Consult with your doctor if you think you are pregnant or before breast-feeding.
Alcohol can increase unwanted side effects of dizziness.
Limit alcohol use. Phentermine HCL is not recommended for use in children. Consult your doctor or pharmacist for further information. Appetite suppressants are not a substitute for proper diet. For maximum effects, this must be used in conjunction with a diet and exercise program.