Amiodarone

Amphetamines

Atorvastatin (Lipitor)

Beta-adrenergic agonists (e.g., albuterol)

Caffeine

Carbamazepine (Tegretol)

Corticosteroids

Cyclosporine (Sandimmune)

Epinephrine

Fluoxetine (Prozac)

Haloperidol

Hypoglycemic agents

Lithium

Metoclopramide (Reglan)

Methylphenidate (Ritalin)

Pseudoephedrine

Terbutaline

Theophylline

Thyroid hormones

Tricyclic antidepressants

Valproic acid (Depakene)

Verapamil