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Sources of Drugs:
There are three varieties of sources – natural, semisynthetic and synthetic. Natural sources are plants, animals, microorganism, minerals, etc. semisynthetic drugs are obtained from natural sources and modified chemically later. Synthetic drugs are produced artificially.
Plants – morphine, atropine, digoxin Animals – insulin
Minerals – ferrous sulphate, magnesium sulphate
Microorganisms – penicillin, streptomycin Semisynthetic – hydromorphone
Synthetic – most of the drugs used today are synthetic – aspirin, paracetamol
Drugs are also produced by genetic engineering – human insulin, human growth hormone
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