<qa>  What is the term for a sedating antihistamine?- Subjects regularly taking any glucose lowering agent, lipid lowering agent, exogenous testosterone, recombinant human growth hormone, or any other endocrine agent that might confound substrate metabolism, oral glucocorticoids glucocorticoid inhalants and nasal sprays are permitted, antihistamines, sedating antihistamines non-sedating antihistamines such as but not limited to Claritin loratadine and Zyrtec cetirizine are permitted, and certain mood stabilizing agents, as some medications may themselves worsen or otherwise alter weight gain, glucose and lipid regulation or otherwise make it difficult to assess the effects of the antipsychotic alone; note that exposure to many psychotropic agents including stimulants and SSRIs is permitted in order to maintain the generalizability of the sample; 