Guaifenesin + Levomenthol + Diphenhydramine HClExpectorant (Cough and Cold Preparation) Indication: Tusca PlusTM is indicated for the symptomatic relief of upper respiratory tract disorders accompanied by productive cough. Dosage & Administration: 12 years & above: 10 ml 4 times daily. Preparation: Each PET bottle contains 100 ml syrup with a measuring cup.