Streptomycin Polymyxin B Sulfate
MajorPolymyxin B and streptomycin can both harm the nerves and the kidneys. Using them together, or one soon after the other, can add to that risk, so this combination should be avoided. If your doctor has prescribed both, ask them about it before you take either one.
These medicines can affect each other in a serious way. Do not start taking them together unless your doctor has said it is OK. If you already take both, do not stop either one on your own: speak to your doctor or pharmacist soon.