Because phentermine may cause sleeplessness, avoid taking phentermine late in the day. Take this medication as prescribed. Do not take phentermine more often or longer than directed. If these effects persist or become bothersome, inform your doctor. 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. This drug is not recommended for use in children. Consult your doctor or pharmacist for further information. For maximum effects, this must be used in conjunction with a diet and exercise program. Do not share this medication with others.