Subcutaneous sumatriptan has been considered as the most efficacious treatment in the acute phase of migraine both on pain alone as well as on associated autonomic symptoms. Pharmacologically, pharmacokinetic parameters, in particular bioavailability, T(max) and C(max) are responsible for the wide efficacy of the compound and the limited adverse effect (AE) profile. The new drug formulations that are the most similar to the pharmacokinetics parameters of the subcutaneous one are promising because they both improve pharmacokinetic bioavailability bypassing the first-pass metabolism and increase patient compliance.