Medications Refill for Backpacking The most commonly used medications for any backpacking trip. Includes: 4 Acetaminophen (500 mg), Pkg./24 Antihistamine (Diphenhydramine 25 mg) 2 Aspirin (325 mg), Pkg./2 4 Diamode (Loperamide HCI 2 mg), Pkg./1 4 Ibuprofen (200 mg), Pkg. Stock No. 0155-0309