Indian National Drug Co. Private Ltd. Offers Ayurvedic Anti-allergic Tonic. Indian National Drug Co. Private Ltd. Has been awarded ISO 9001:2000 certifications. Ayurvedic Anti-allergic Tonic reduces cough bouts without side-effects such as drowsiness. Ayurvedic Anti-allergic Tonic is an effective expectoration and improves breathing naturally by bronchodilatation and soothes & cools the throat. This herbal tonic is effective in allergic cough, bronchitis, upper respiratory infections; smoker`s cough.This tonic is made from vasak, tulsi, kankrashringi, kantakari etc.