Hello, My 13 year old son weighs 170 lbs. He takes generic Biaxin 500 mg and Mebendazole 100 mg twice daily for Lyme, Bartonella, and Babesia, as well as other supplements. Tonight he accidently took his evening dose of the RXs twice, about an hour apart (11:30 p.m. and 12:30 a.m.). I just contacted a pharmacist who said the Biaxin was not an overdose amount, but the Mebendazole (anti parasitic) may be. What do I need to do?