Drug Administration (FDA) website (http://www.fda.gov/Drugs/DrugSafety/ucm085729.htm) or the manufacturer's website to obtain the Medication Guide.www.nlm.nih.gov/medlineplus/druginfo/meds/a691006.html - Drugs and SupplementsChronic Meningitis (Merck & Co., Inc.) ... weakened immune system due to disorders such as human immunodeficiency virus (HIV) infection or AIDS or who take drugs that suppress