Home > Medications > Cosopt PF Cosopt PF (Dorzolamide/Timolol) (℞) Prescription Required 1. Select Dosage Cosopt Preservative Free Timolol Maleate, Dorzolamide Hydrochloride Cosopt Preservative Free 2%/0.5% Manufacturer: Merck Sharp & Dohme Product of: Canada Shipped from: Canada brand *Product image for reference use only. 2. Select Quantity 12 mL (60 doses) $95.00 USD ($7.92/unit) 2 x 12 mL (60 doses) $178.00 USD ($7.42/unit) 3 x 12 mL (60 doses) $240.00 USD ($6.67/unit) Add to Cart