Scopolamine effects on the pressor response to thyrotropin-releasing hormone in humans

Susan E. Molchan, James L. Hill, Marcia Minichiello, Benedetto Vitiello, Trey Sunderland

Research output: Contribution to journalArticlepeer-review


Thyrotropin-releasing hormone (TRH) produces a marked pressor effect, which may be mediated by central cholinergic neurons, which in turn enhance sympathetic nervous system activity. In this study, 22 subjects (10 patients with Alzheimer's disease and 12 elderly controls) were administered IV scopolamine or placebo prior to administration of IV high-dose TRH (0.5 mg/kg). Systolic blood pressure was less on the day scopolamine was administered prior to TRH administration, as compared with placebo (F[1,20]=6.12, p<0.02). Results indicate that the pressor effect of TRH is attenuated by scopolamine, indicating a role of the cholinergic system in this response in humans.

Original languageEnglish (US)
Pages (from-to)933-938
Number of pages6
JournalLife Sciences
Issue number13
StatePublished - 1994

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology
  • Pharmacology, Toxicology and Pharmaceutics(all)


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