Around 2,000 bottles of banned cough syrup Phensedyl were seized and three people were arrested on Tuesday in West Bengal's Nadia district which borders Bangladesh, police said.
Acting on a tip-off, police intercepted two vehicles in Natunpara in Bhimpur police station area and seized the cough syrup bottles, while arresting the occupants, a police officer said.
The arrested persons are residents of Nadia's Karimpur, which is close to the India-Bangladesh border.
Phensedyl contains codeine, which is a narcotic drug that causes addiction when used in large quantities over a period of time. The cough syrup is used as an intoxicant in Bangladesh as an alternative to alcohol.