S-Triazine and thiocarbamide group containing drug create their own identity in the drug , pharmaceutical and medicinal sciences in last four decades .Hence, the viscometric measurements of recently synthesized drugs viz. 1- (4-hydroxy)-S-triazino-3-p-chlorophenylthiocarbamide(L1),1-(4-hydroxy)-S-triazino–3-allylthiocarbamide(L2) and 1-(4-hydroxy)-S-triazino-3-t-butylthiocarbamide(L3), were carried out at various percentage compositions of solvent to investigate effect of structure , group on S-triazinothiocarbamides, The data and result obtained during this investigation gave detail information regarding drug absorption , transmission, activity and effect of these drugs. Taking all these things into consideration this research work was carried out.