Tacrolimus is an immunosuppressive agent used to prevent allograph rejection.1,2 It is available as immediate-release (0.5-, 1-, and 5-mg) or extended-release (0.5-, 1-, 3-, and 5-mg) capsules. The stability of extemporaneous oral suspensions in Ora-Plus/Ora-Sweet and Ora-Plus/syrup has been reported previously.3-6The current study was undertaken to evaluate the stability of tacrolimus in Oral ...