For example, ACE inhibitors used to treat high blood pressure may decrease blood zinc levels similar to thiazide diuretics, the anticonvulsant valproic acid (VPA) that was already reported to increase the risk for autism upon prenatal exposure [83], tetracycline antibiotics, corticosteroids, acid blockers such as histamine-2 receptor antagonists (H2-blockers), and many neuropsychiatric drugs such as Fluoxetine (Prozac), Paroxetine (Paxil), Sertraline (Zoloft), Citalopram (Celexa), and Venlafaxine (Effexor) [117]. This evidence concerns the gene ACE and autism.