Pyridazine derivatives have received much attention due to their reactions. Since, many pyridazine derivatives possess potential therapeutic effects, one can expect that replacement of a heterocyclic aromatic moiety in a bioactive molecule with the pyridazine nucleus would alter the physiochemical characteristics of that molecule significantly. Literature surveys showed that triazole, thiazole and thiophene derivatives, which are both commercially available drugs and agents under clinical investigations were the subject of a comprehensive review. On the other hand, Sulfonamides and...