s means sine - without usually written with a bar on top of the "s" in Prescription
Similar to s
comp. - compound cr., crm - cream CST - Continue same treatment D.A.W. - dispense as written i.e., no generic substitution d.t.d. - dentur tales doses - give of such doses D.W. - distilled water D5NS - dextrose 5% in normal saline 0.9%