Non-selective vasopressin receptor antagonist is: (A) Tolvaptan, (B) Conivaptan, (C) Relcovaptan, (D) Lixivaptan
Answer is B. Conivaptan is a non-selective vasopressin V1 and V2 antagonistTolvaptan, lixivaptan are selective V2 antagonists used in SIADH.Relcovaptan is a selective V1 antagonist.Ref: HL Sharma 3rd ed Pg 245