Vadodara Police Commissioner Manoj Shashidhar told PTI that the three were arrested yesterday by a Special Operations Group team led by Inspector HM Chauhan and 720 ampoules of these injections were seized from them.
He identified the three arrested persons as Naynaben Devendrabhai Pathak, her son Samarth and Samarth's wife Monali.
Naynaben told police that she got the injections from a person in Farrukhabad in Uttar Pradesh.
Police said that the arrests were made when Samarth and Monali came to Vadodara railway station last night to receive Naynaben who was returning by train from Farrukhabad.
He explained that the injections, an anaesthetic used during surgery and to be sold strictly by prescription, was being used by addicts as a drug.
"It is being used as a drug by addicts. The target group is mostly students and others in the age group of 16-35 years. The normal price of one ampoule is Rs 5 but the accused were selling them at a much higher price," he informed.