Similarly, the Query 2 expression of "drug types having leukopenia as adverse events" yielded 131 types of drug codes using SIDER 2, and the Query 3 expression of "of the atypical antipsychotic drugs, those having a 5HT2C or H1 inhibitory effect" yielded 78 drug types, with Queries 2 and 3 obtaining 1171 and 58 results, respectively. This evidence concerns the gene HTR2C and Decreased total leukocyte count.