Pamelor (Nortriptyline) is used for treating depression.

Paxil (Paroxetine) is an anti-depressant drug.

Pepcid is used for treating and preventing ulcers. It is also used to treat gastroesophageal reflux disease (GERD), conditions that cause increased acid secretion, and esophagitis.

Periactin is used to treat sneezing; runny nose; itching, watery eyes; hives; rashes; itching; and other symptoms of allergies and the common cold.

Pilocarpine causes constriction of the pupils (miosis) and reduces pressure within the eye.

Plavix (Clopidogrel) is used to prevent strokes and heart attacks.

Plendil (Felodipine) is used to treat high blood pressure (hypertension).

Ponstel (Mefenamic Acid) is indicated for treating the menstrual pain.

Prandin is used for managing type 2 (non-insulin-dependent) diabetes.

Prevacid (Lansoprazole) decreases the amount of acid produced in the stomach.

Prilosec (Omeprazole) blocks the production of acid by the stomach.

Prograf (Tacrolimus) is used for the prevention of rejection of transplanted organs.

Protonix (Pantoprazole) is used to treat erosive esophagitis (damage to the esophagus from stomach acid).

Prozac (Fluoxetine) is in a new class of antidepressant medications that affects chemical messengers within the brain.

Pulmicort (Budesonide) is an anti-inflammatory medication (corticosteroid) used in the prevention of asthma.