Antihistamine
The vast majority of marketed H-antihistamines are receptor antagonists and only a minority of marketed compounds are inverse agonists at the receptor. Clinically, H-antihistamines are used to treat allergic reactions and mast cell-related disorders. Sedation is a common side effect of H-antihistamines that readily cross the blood–brain barrier; some of these drugs, such as diphenhydramine and doxylamine, are therefore used to treat insomnia. H-antihistamines can also reduce inflammation, since the expression of NF-κB, the transcription factor the regulates inflammatory processes, is promoted by both the receptor's constitutive activity and agonist (i.e., histamine) binding at the H receptor.
Ergogenic use of anabolic steroids
Anabolic steroid users tend to be disillusioned by the portrayal of anabolic steroids as deadly in the media and in politics. According to one study, anabolic steroid users also distrust their physicians, and in the sample, 56% had not disclosed their anabolic steroid use to their physicians. Another 2007 study showed that while 66% of individuals using anabolic steroids for non-medical purposes were willing to seek medical supervision for their steroid use, 58% lacked trust in their physicians, 92% felt that the medical community's knowledge of non-medical anabolic steroid use was lacking, and 99% felt that the public has an exaggerated view of the side effects of anabolic steroid use. A 2006 study has showed that long-term anabolic steroid users were more likely to have symptoms of muscle dysmorphia and also showed stronger endorsement of more traditional male roles.