What special precautions should I follow? 

Before taking alprazolam:

• Tell  your doctor and pharmacist if you are allergic to alprazolam, chlordiazepoxide (Librium, Librax), clonazepam (Klonopin), clorazepate (Tranxene), diazepam (Valium), estazolam (ProSom), flurazepam (Dalmane), halazepam (Paxipam), lorazepam (Ativan), oxazepam (Serax), prazepam (Centrax), quazepam (Doral), temazepam (Restoril), triazolam (Halcion), or any other medications.
• Do  not take alprazolam if you are taking itraconazole (Sporanox) or ketoconazole (Nizoral).
• Tell  your doctor and pharmacist what other prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking. Be sure to mention any of the following: amiodarone (Cordarone, Pacerone); antidepressants ('mood elevators') such as desipramine (Norpramin), imipramine (Tofranil), and nefazodone (Serzone); antifungals such as fluconazole (Diflucan); antihistamines; cimetidine (Tagamet); clarithromycin (Biaxin); cyclosporine (Neoral, Sandimmune); diltiazem (Cardizem, Dilacor, Tiazac); ergotamine (Cafatine, Cafergot, Wigraine, others); erythromycin (E.E.S., E-Mycin, Erythrocin); isoniazid (INH, Nydrazid); medications for mental illness and seizures; nicardipine (Cardene); nifedipine (Adalat, Procardia); oral contraceptives (birth control pills); propoxyphene (Darvon); selective serotonin reuptake inhibitors (SSRIs) such as fluoxetine (Prozac, Sarafem), fluvoxamine (Luvox), paroxetine (Paxil), and sertraline (Zoloft); sedatives; sleeping pills; and tranquilizers. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
• Tell  your doctor if you have or have ever had glaucoma; depression; or lung, kidney, or liver disease.
• Tell  your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking alprazolam, call your doctor immediately.
• If  you are having surgery, including dental surgery, tell the doctor or dentist that you are taking alprazolam.
• You  should know that alprazolam may make you drowsy. Do not drive a car or operate machinery until you know how this medication affects you.
• Remember  that alcohol can add to the drowsiness caused by this medication.

What special dietary instructions should I follow?

Talk to your doctor about drinking grapefruit juice while taking this medicine.

What should I do if I forget a dose?

Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.