Since different antibiotics target different bacteria no one can purchase a single antibiotic and expect it to be effective across the board. Yes, there are some broad spectrum antibiotics but knowing when you use what is why physicians take Pharm 502a, Pharm 504a, Pharm 506a, Pharm 528a, Pharm 550a, etc., etc., etc.,. Self medicating is a tad dumb unless you are with Natertot during the zombie apocalypse and there is no other choice.
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