How to remember the names of the MC used drugs third generation Cephalosporins? Easy. Third Generation–>cef-Tazidime, cefo-Taxime, and cef-Triaxone. All of them start with CEF (they are Cephalosporins) and have the letter T in their name, right after CEF. There is an exception of that rule. Cef-oTeTan is a second generation Cephalosporin, starts with CEF and has the letter T in its name. It can’t be easier than that. Second generation=IInd. generation–>double T in the name of Cef-oTeTan. Simple!!!