Apo‑Dorzo/Timop is a sterile, isotonic, buffered ophthalmic solution combining dorzolamide and timolol in a slightly viscous, aqueous base. Each mL contains 20.00 mg dorzolamide (22.26 mg as dorzolamide hydrochloride) and 5.00 mg timolol (6.83 mg as timolol maleate). The formula includes benzalkonium chloride 0.0075% as a preservative and non‑medicinal excipients for stability and comfort. Supplied as a 10 mL bottle; prescription required in Canada (DIN 02299615).