Huge quantities of drugs valued at more than Rs 400 crore have been seized from two neighbouring northeastern states – Mizoram and Assam – and three persons were arrested, officials said. The seizure of 39 lakh tablets of specific brands of decongestant and antihistamine worth Rs 390.4 crore was made from a house in east Mizoram's Champhai town bordering Myanmar on Wednesday. It is one of the biggest drug hauls made in the state, they said. Decongestants are a type of medicine that provides short-term relief for nasal congestion, while antihistamine is commonly used to treat symptoms of allergies.