Butyryltimolol, an effective prodrug of Timolol, improves the corneal penetration of Timolol[1]. Butyryltimolol is a β-adrenergic blocker[2].
Butyryltimolol, a prodrug of Timolol, is equally effective as 240-min nasolacrimal blockade in enhancing ocular drug absorption[1].
[1]. Chang SC, et al. Relative effectiveness of prodrug and viscous solution approaches in maximizing the ratio of ocular to systemic absorption of topically applied timolol. Exp Eye Res. 1988 Jan;46(1):59-69.
[2]. Potter DE, et al. Ocular and cardiac beta-antagonism by timolol prodrugs, timolol and levobunolol. Curr Eye Res. 1988 Aug;7(8):755-9.