Pharmacology: Basics for RNs - NurseCe4Less

Therefore, if TD50 = 500 mg and ED50 = 5 mg, the drug is 100-fold more selective for the preferred response and the therapeutic index is 100. The therapeutic index for humans is rarely identified with great accuracy. ... an order might be written for Amoxicillin 500mg, but the drug that is available in the pharmacy is Amoxicillin 250 mg per ... ................
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