My boyfreinds s son gave us pinworms . VILE!!! I took PinX, experienced some releif from the horrid itching, but about 4 days later it s still there, alabeit to a lesser degree. So today I took another dose of PinX. I know you re suposed to wait 2 weeks in between doses but I just couldn t stand it. Now my doctor has called in a script for Mebendazole for me. Since I took PinX twice over the course of 4 days, can I also take the Mebendazole tomorrow, or should I wait a few days in between? I want this disgusting itching GONE! So far I have not had any side effects from the PinX...