The incident – believed to be the first in the Portsmouth area – was reported at 2.11am in the early hours of Friday morning, at Pryzm nightclub on Stanhope Road in the city centre.
It comes after we previously revealed that 18 spiking incidents have been reported to local police since July.
Incidents of spiking-via-injection have surfaced nationwide but this is the first reported incident of this nature in the city
A statement from Hampshire Police said, “It was reported to us at 2.11am this morning (Friday 22nd October) that an 18-year-old woman had been assaulted at Pryzm Nightclub on Stanhope Road.
“The woman reported feeling tenderness and numbness to her arm, before noticing a small injury consistent with a pinprick.
“Officers attended and the woman was taken to Queen Alexandra Hospital as a precaution.
“This incident is currently under investigation and enquiries are being carried out to determine the exact circumstances.”
Anyone with any information is asked to contact Hampshire Constabulary on 101 quoting 44210423993.