The woman is identified as Razia Begam, a native of Pookkottur in the Malappuram district.
The police on Thursday arrested some youths in Karipur of Malappuram district who were allegedly using drugs in Karipur. After their interrogation, it was learned that they were getting the drugs from Morayur.
The police then monitored the rented quarters in Morayur based on the information provided by the youths.
The police are investigating the sources from where the woman is getting drugs.
According to the police, Razia Begum is the main link in the drug trafficking network in other states.