amoxil is an antibiotic which contains penicillin. It is quite effective because of low cost and the taste is also good. It is recommended to take Amoxil according the instruction of an expert. Smaller or larger amount of dosage can be injurious for health so you should be careful while taking it. You should not take Amoxil if you are allergic from penicillin antibiotic such as dicloxacillin, ampicillin, oxacillin etc. Many-a-times antibiotic medicines can be liable for diarrhea. In that case you should stop to take it or contact your doctor before taking any anti-diarrhea medicines. There are several side effects of Amoxil like anemia, crystalluria, anxiety, agitation, insomnia etc. you should be cautious if you are having these problems and you must consult with your doctor regarding the dosage.