Are there any studies which compare the oral and the topical dose required of drugs (Obviously I'm thinking about duasteride or proscar, but there may be a more generic study which could prove the rule if not the specific case) to reach a certain level of saturation in the scalp? It would be great to know that say a 2% solution of proscar in an alcohol base would = a 6mg dose administered orally.
Very best to you all
NV

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