Is It Safe To Use Veterinary Bicillin To Treat Lyme Disease?

can I use veterinary bicillin (dura pen) to substitute for my present use of human pharmaceutical bicillin la to treat my lyme disease. human pharmaceutical bicillin la is outrageously expensive. dura penn is half made up with benzathine penicillin g and half penicillin procaine g. would the dura penn harm me ? it contains 1.75 mg of formaldehyde per ml. some physicians have hinted that dura penn could be used as a substitute for pharmacy prescribed bicillin la.