Biological treatment for psoriasis recommended dosage

[Fred]

Isn't that what the trials for the drugs do. Determine what is the doses that are required to control the disease
And of course before it ever gets to the trials there are lab tests to see what cells they are blocking and no doubt how much is needed to successfully be a barrier and the length of time when it starts to fail, and when more is required . Is my best guess

Sounds like a good guess to me.

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But hang on Whisky, Gin, Vodka, Etc come in the same size and same strength, so why are bio's all different.

because they are anaesthetic not aimed at  psoriasis

They work for me.