am ic in ▁C ▁complex . ▁The ▁exact ▁composition ▁of ▁a ▁given ▁sample ▁or ▁lot ▁of ▁gent am ic in ▁is ▁not ▁well ▁defined , ▁and ▁the ▁level ▁of ▁gent am ic in ▁C ▁components ▁or ▁other ▁components ▁in ▁gent am ic in ▁may ▁differ ▁from ▁lot - to - lot ▁depending ▁on ▁the ▁gent am ic in ▁manufact urer ▁or ▁manufact uring ▁process . ▁Because ▁of ▁this ▁lot - to - lot ▁vari ability , ▁it ▁can ▁be ▁difficult ▁to ▁study ▁various ▁properties ▁of ▁gent am ic in ▁including ▁ph arm ac ok inet ics ▁and ▁micro organ ism ▁sus cept ibility ▁if ▁there ▁is ▁an ▁unknown ▁combination ▁of ▁chem ically ▁related ▁but ▁different ▁comp ounds . ▁ ▁Cont ra ind ic ations ▁Gent am ic in ▁should ▁not ▁be ▁used ▁if ▁a ▁person ▁has ▁a ▁history ▁of ▁hyp ers ens itivity , ▁such ▁as ▁an ap hy la xis , ▁or ▁other ▁serious ▁to xic ▁reaction ▁to ▁gent am ic in ▁or ▁any ▁other ▁am in og ly cos ides . ▁Gre ater ▁care ▁is ▁required ▁in ▁people ▁with ▁my as then ia ▁gra vis ▁and ▁other ▁neur om us cular ▁dis orders ▁as ▁there ▁is ▁a ▁risk ▁of ▁w ors ening ▁weak ness . ▁ ▁Special ▁populations ▁ ▁P reg n ancy ▁and ▁breast feed ing ▁Gent am ic in ▁is ▁not ▁recommended ▁in ▁pre gn ancy ▁unless ▁the ▁benefits ▁out we igh ▁the ▁ris ks ▁for ▁the ▁mother . ▁Gent am ic in ▁can ▁cross ▁the ▁pla cent a