This is the job description <a href="http://www.infocalcbba.edu.bo/biblio/index.php/isoniazid-renal-dose-medscape-0042.pdf">isoniazid medscape</a>  This actually seems a reasonable proposal and is no different to how healthcare operates in Canada and is infinitely better than a two tier system like that operating in America. I don't think a £200 levy would work. It wouldn't even cover a couple of hours of a doctor's time let alone anything that would require hospitalization!