I took two doses of vermox when I was infected with pinworm-I am a teacher . The first dose I took was 1 tablet, the second time the doctor sent me 5 tablets which I took. I have had pain in my upper right quandrant for one year now and it started right after I took the second dose. Please elaborate on some of the dangers of the drugs. I have looked everywhere on the internet and cannot find anything. I like the alternative you posted. I work with autistic students -kinder and I could very well catch pinworms again. Please advise on the dangers of vermox. Thanks for your help. thanks elizabeth