DRUG INTERACTIONS: Tell your doctor of all prescription and nonprescription medication you may use, especially: azole antifungals (e.g., itraconazole, ketoconazole), tetracycline antibiotics (e.g., doxycycline, minocycline), quinolone antibiotics (e.g., ciprofloxacin, levofloxacin), thyroid medicine (e.g., levothyroxine), calcium channel blockers (e.g., diltiazem, verapamil), quinidine, delavirdine, digoxin, sodium polystyrene sulfonate. Famotidine is available in both nonprescription and prescription formulations. Do not take both types at the same time. Consult your pharmacist. Do not start or stop any medicine without doctor or pharmacist approval.

OVERDOSE: If overdose is suspected, contact your local poison control center or emergency room immediately. US residents can call the US national poison hotline at 1-800-222-1222. Canadian residents should call their local poison control center directly. Symptoms of overdose may include: trouble breathing, unusually fast heartbeat, tremors, vomiting, restlessness, weakness, fatigue, or dizziness.

NOTES: Laboratory and/or medical tests may be performed to monitor your progress.

MISSED DOSE: Not applicable.

STORAGE: Store at room temperature between 77 and 86 degrees F (25 and 30 degrees C) away from light and moisture.