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The strength and reliability of drugs do not receive proper attention by physicians for, as a matter of fact, these important attributes of a drug are lacking for several reasons in many instances. Aside from the fact that the gatherer of crude vegetable drugs may introduce into his bundle enough of another similar plant to enable him to make a profit out of his sales to the wholesaler, who bids him down to the lowest figures, and that this wholesaler also desires to make as much as possible out of his purchase, and finally that the retailer wishes to buy as cheap and sell as high as he can, there are other factors even more difficult of control to be contended with. These are that many medicinal plants only contain their greatest activity if gathered at a certain time of growth, or certain parts only contain medicinal powers when in
THE STRENGTH AND RELIABILITY OF DRUGS. JAMA. 1899;XXXII(1):35–36. doi:10.1001/jama.1899.02450280043006
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