375 mg tablet: polyethylene glycol, polysorbate 80, Blue #2/ Indigo Carmine Aluminium Lake (E132) 500 mg tablet: polyethylene glycol, polysorbate 80, Yellow #6/ Sunset Yellow FCF Aluminium Lake (E110) 750 mg tablet: glycerol triacetate, lactose monohydrate, Blue #1/ Brilliant Blue FCF Aluminium Lake (E133) and Yellow #5/ Tartrazine Aluminium Lake (E102)