SIDE EFFECTS: Dry mouth, nausea, upset stomach, diarrhea, constipation, dizziness, trouble sleeping, or headache may occur. If any of these effects persist or worsen, notify your doctor promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these unlikely but serious side effects occur: blurred vision, swelling of ankles/feet, rapid/unexplained weight loss, fast/irregular heartbeat, mental/mood/behavior changes (e.g., agitation, aggression, mood swings, depression, abnormal thoughts), uncontrolled movements (e.g., muscle twitching/shaking), outbursts of words/sounds, change in sexual ability/interest.

Seek immediate medical attention if any of these rare but very serious side effects occur: shortness of breath, chest/jaw/left arm pain, fainting, seizures, blurred vision, weakness on one side of the body, slurred speech, confusion.

A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Read the Desoxyn (methamphetamine hydrochloride) Side Effects Center for a complete guide to possible side effects »

PRECAUTIONS: Before taking methamphetamine, tell your doctor or pharmacist if you are allergic to it; or to other sympathomimetic amines (e.g., dextroamphetamine); or if you have any other allergies.This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: glaucoma, heart/blood vessel disease (e.g., coronary artery disease, angina, irregular heartbeat, valve disorders, heart failure, cardiomyopathy), problems with heart structure (e.g., valve problems), history of heart attack or stroke, moderate or severe high blood pressure (hypertension), overactive thyroid (hyperthyroidism), personal or family history of regular use/abuse of drugs/alcohol, certain mental/mood conditions (e.g., severe agitation, unusual/unrealistic thoughts, psychosis).

Before using this medication, tell your doctor or pharmacist your medical history, especially of: diabetes, mild high blood pressure (hypertension), personal or family history of uncontrolled movements or outbursts of words/sounds (e.g., due to Tourette's syndrome), family history of sudden death/irregular heartbeat, family/personal history of mental/mood disorders (e.g., bipolar disorder, depression, psychotic disorder, suicidal thoughts), seizures.

This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.

Before having surgery, tell your doctor or dentist that you are taking this medication.

Caution is advised when using this drug in the elderly because they may be more sensitive to its effects.

Caution is advised when using this drug in children because it may affect weight, growth rate, and final height. The doctor may recommend temporarily stopping the medication from time to time to reduce this risk. Monitor your child's weight and height, and consult your doctor or pharmacist for more details.

During pregnancy, this medication should be used only when clearly needed. Infants born to mothers who are dependent on this medication may be born too soon (premature) and have low birth weight. Discuss the risks and benefits with your doctor. They may also have withdrawal symptoms such as irritability, abnormal/persistent crying, or unusual tiredness. Tell your doctor immediately if you notice any of these symptoms in your newborn.

This drug passes into breast milk and could have undesirable effects on a nursing infant. Therefore, breast-feeding is not recommended while using this drug. Consult your doctor before breast-feeding.