Viagra and penicillin: the same problem?
Haslam
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D016527:Drug Costs; D005194:Family Practice / Q000191:economics; D006801:Humans; D010406:Penicillins / Q000627:therapeutic use; D010726:Phosphodiesterase Inhibitors / Q000191:economics* / Q000627:therapeutic use; D010879:Piperazines / Q000191:economics* / Q000627:therapeutic use; D011687:Purines; D000068677:Sildenafil Citrate; D013222:State Medicine / Q000191:economics; D013450:Sulfones; D006113:United Kingdom
D010406:Penicillins; D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate