Human Cerebral Blood Flow Regulation

Indomethacin is a nonsteroidal anti-inflammatory drug commonly used to reduce fever, pain, stiffness, and swelling from inflammation. It prevents the production of prostaglandins, endogenous signaling molecules known to cause symptoms from inflammation. Indomethacin is used to test COX as a potential mechanism explaining sex differences in CBF control. Indomethacin usage is IND exempt.

Participants will be screened for lactose intolerance. Total dosing will be calculated to match the mg needed for the indomethacin study visit. Placebo usage is IND exempt.

"Gonadotropin-Releasing Hormone (GnRH) antagonist ganirelix acetate as a model to isolate estrogen and testosterone effects on the cerebrovascular system. Participants receive daily injections of ganirelix for 12-14 days for Aim 3 studies only. This will be overseen by clinical endocrinologists.~Both males and females receive this treatment in Aim 3."

In Aim 3, males receive this for 7-9 days of the ganirelix treatment.

In Aim 3, females receive this for 7-9 days of the ganirelix treatment.

Participants will be given a dose of over-the-counter antacid to combat the gastrointestinal distress expected from Indomethacin. Participants will be given a dose of over-the-counter antacid during the placebo visit to mimic the indomethacin study visit. Antacid is IND exempt.