Mgbe ị na-achọ karama mgbakwụnye, Vanson na-enye karama gbara gburugburu ọgwụ na-acha ọcha jikọtara ya na okpu PE nwere akwa ribbed na-acha ọcha.Ubu gbara okirikiri, akụkụ kwụ ọtọ, na ntọala siri ike na-eme ka karama ngwugwu pill ndị a bụrụ nhọrọ kacha elu mgbe ị na-ebukọ ngwaahịa dị iche iche.N'iji nnukwu nha dị iche iche dị na karama gburugburu ọgwụ, ihe ndị a na-adịgide adịgide nwere ike inye aka n'ịmepụta ahịrị karama mgbakwunye, ọgwụgwọ OTC, na ndị ọzọ.