The accused has been identified as 25-year-old Balwinder Singh, they said.
As per the complaint filed by the victim, Singh offered her a ride when she was going to her house yesterday but forcibly took her to his own residence, police said.
Later, she was forced to drink sedative-laced water following which she became unconscious and the accused outraged her modesty, they said.
The victim raised an alarm after gaining consciousness and the passersby rescued her, police said.