Trecadrine (also known as Trecadrina, Trecadrinum, (1-((2-(10,11-dihydro-5H-dibenzo(a,d)cyclohepten-5-ylidene)ethyl)methylamino)ethy)benzyl alcohol or (1R,2S)-α-(1-((2-(10,11-Dihydro-5H-dibenzo(a,d)cyclohepten-5-ylidene)ethyl)methylamino)ethyl)benzyl alcohol) is a substance of the phenylethanolamine class.