This is a combination of two medicines: Chlorpheniramine and Menthol which relieve cold symptoms. Chlorpheniramine is an antiallergic which relieves allergy symptoms like runny nose, watery eyes and sneezing. Menthol is an organic compound which loosens the mucus (phlegm), making it easier to cough out, and also relieves minor throat irritation.
Sleepiness
Chlorpheniramine+Menthol is used in common cold symptoms.