Abdominal cramps and headache were the most common adverse events after treatment ; abdominal cramps were reported by 13 ( 120 % ) children for albendazole plus ivermectin , 10 ( 93 % ) for albendazole plus mebendazole , 20 ( 182 % ) for albendazole plus oxantel pamoate , and 16 ( 145 % ) for mebendazole ; headaches were reported by 5 ( 46 % ) children for albendazole plus ivermectin , 6 ( 56 % ) for albendazole plus mebendazole , 12 ( 109 % ) for albendazole plus oxantel pamoate , and 7 ( 64 % ) for mebendazole .