Stop using dextroamphetamine and call your doctor at once if you have any of these serious side effects:

• fast, pounding, or uneven heartbeats;

• feeling light-headed, fainting;

• increased blood pressure (severe headache, blurred vision, trouble concentrating, chest pain, numbness, seizure); or

• tremor, restlessness, hallucinations, unusual behavior, or motor tics (muscle twitches).

Less serious side effects may include:

• headache or dizziness;

• sleep problems (insomnia);

• dry mouth or an unpleasant taste in your mouth;

• diarrhea, constipation;

• loss of appetite, weight loss; or

• loss of interest in sex, impotence, or difficulty having an orgasm.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.

What other drugs will affect dextroamphetamine?

Before taking dextroamphetamine, tell your doctor if you are using any of the following drugs:

• blood pressure medications;

• a diuretic (water pill);

• cold or allergy medicines (antihistamines);

• acetazolamide (Diamox);

• chlorpromazine (Thorazine);

• ethosuximide (Zarontin);

• guanethidine (Ismelin);

• haloperidol (Haldol);

• lithium (Eskalith, Lithobid);

• methenamine (Hiprex, Mandelamine, Urex);

• phenytoin (Dilantin), phenobarbital (Luminal, Solfoton);

• propoxyphene (Darvon, Darvocet);

• reserpine;

• sodium bicarbonate (Alka-Seltzer); or

• antidepressants such as amitriptyline (Elavil), amoxapine (Ascendin), clomipramine (Anafranil), desipramine (Norpramin), imipramine (Tofranil), or nortriptyline (Pamelor).

This list is not complete and there may be other drugs that can interact with dextroamphetamine. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.

Where can I get more information?

Your pharmacist can provide more information about dextroamphetamine.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.