Table 1.

Dosage forms used in the present study.

Dosage Form	Ingredients
Immediate release tablets with 5% HPMC coating	Caffeine, croscarmellose, lactose, magnesium stearate, silica dioxide, hydroxypropyl methylcellulose
Hard gelatin capsule (size 0)	Caffeine, croscarmellose, lactose, gelatin
Quali-V® capsules (size 0)	Caffeine, croscarmellose, lactose, hydroxypropyl methylcellulose, carrageenan
Vcaps® plus capsules (size 0)	Caffeine, croscarmellose, lactose, hydroxypropyl methylcellulose