Do not take this medicine with any of the following medications:
-MAOIs like Carbex, Eldepryl, Marplan, Nardil, and Parnate

This medicine may also interact with the following medications:
-cimetidine
-ketoconazole
-ketoprofen
-medicines for colds or breathing difficulties
-phenobarbital
-phenytoin
-stimulant medicines for attention disorders, weight loss, or to stay awake
-theophylline

They need to know if you have any of these conditions:
-anxiety
-colitis
-diabetes
-heart disease or irregular heartbeat
-high blood pressure
-insomnia
-kidney disease
-liver disease
-panic attacks
-peptic ulcer disease
-seizure
-thyroid disease
-an unusual or allergic reaction to caffeine, aminophylline, theophylline, other medicines, foods, dyes, or preservatives
-pregnant or trying to get pregnant
-breast-feeding

This medicine has about as much caffeine as a cup of coffee. Limit the use of caffeine-containing medications, foods, or drinks while taking this product. Too much caffeine may cause you to feel nervous, irritable, or to have a rapid heart beat or trouble sleeping.

This medicine is for occasional use only. It is not intended for use as a substitute for sleep. If fatigue or drowsiness continues, see a doctor. If you have been taking this medicine regularly, you can get withdrawal symptoms when you stop taking it. You may feel tired, dizzy, nervous, or have a headache.

Do not take this medicine close to when you want to sleep.

Talk to your doctor or health care professional before you take any other over-the-counter medicines, especially cold and allergy medicines.

Do not take this medicine with grapefruit juice; this may increase the effects of caffeine.

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Avoid storing at high temperatures. Protect from moisture. Throw away any unused medicine after the expiration date.