in our patient , a 34-year-old man with poorly controlled type 1 diabetes and autonomic neuropathy manifested by postural hypotension and diarrhea , treatment with diphenhydramine and cimetidine ( h1 and h2 histamine antagonists , respectively ) markedly improved the hypotension and diarrhea and led to better blood glucose control .
C0020651
postural hypotension
C0020649
hypotension