title: Naloxone and naltrexone block the gastrointestinal effects of TRH and MK-212.
mesh_terms: D000818:Animals; D004064:Digestive System / Q000187:drug effects*; D008297:Male; D009270:Naloxone / Q000031:analogs & derivatives* / Q000494:pharmacology*; D009271:Naltrexone / Q000494:pharmacology*; D011719:Pyrazines / Q000037:antagonists & inhibitors*; D011817:Rabbits; D051381:Rats; D011919:Rats, Inbred Strains; D013973:Thyrotropin-Releasing Hormone / Q000037:antagonists & inhibitors*
chemical_list: D011719:Pyrazines; D009270:Naloxone; D009271:Naltrexone; D013973:Thyrotropin-Releasing Hormone; C014896:6-chloro-2-(1-piperazinyl)pyrazine