<prompt> Widmarks formula is used for measurement of blood levels of:BenzodiazepinesBarbituratesAlcoholTranquilizers  <response>: Widmarks a p.r.c., a wt of alcohol in gms in body, p body wt in kg, c conc. of alcohol in blood in gmkg, r constant 0.6 for men, 0.5 for women.For Urine, formula is- a 3,4p.r.q, where q is the conc. of alcohol in urine in mgkg. 