Police have arrested eight foreigners and five Thais for allegedly selling fake viagra during a search of 17 locations on Bangkok's Sukhumvit area.
Immigration Bureau chief Lt Gen Surachate Hakpal said the operation took place from late Friday night until early hours of Saturday.
He led economic crime suppression police and tourist police in searches at 17 tourist locations on Sukhumvit Road along with Kevin Harrington, a representative of Pfizer, the makers of the erectile dysfunction drug.
Surachate quoted Harrington as saying that the fake viagra was dangerous as it was made of powder and dangerous chemicals.
The fake viagra was being sold for just Bt200 a box, compared to Bt3,000 for the real drug, Surachate said.
The operation seized 118 fake viagra boxes, 1,667 items of controlled medicine, 396 sex toys and 345 fake brand-name goods, Surachate said.