“…31 Ogawa et al reported the successful use of a cardiac allograft from TCA intoxication. 32 Because TCAs are hepatically metabolized, lower doses should be used in transplant recipients with hepatic impairment. 25 The secondary amines (i.e., nortriptyline), which require less hepatic metabolism, are preferable, 25 while nortriptyline's unique therapeutic window 33 allows toxicity monitoring.…”