Use

Tacrolimus (Prograf) is a macrolide antibiotic derived from the fungus Streptomyces tsukubaensis. It is used to suppress T cell activity by inhibiting calcineurin, which is necessary to manage immunosuppression in transplant patients. Due to its narrow therapeutic window and individual pharmacokinetic variability, therapeutic drug monitoring of tacrolimus is critical to ensuring efficacy while minimizing toxicity. Monitoring postdosing blood concentrations helps optimize dosing to prevent organ rejection and manage side effects, particularly nephrotoxicity.