About 50,000 capsules of a sex pill are being recalled after health authorities found it was being illegally sold as a health product.
The product was sold by the Watson's and Health Plus pharmacy chains.
The authorities issued the recall order yesterday after tests confirmed the mainland-produced herbal 'Super Power 72' pill contains sildenafil, the active anti-impotence ingredient in Viagra, used for erectile dysfunction.
Super Power 72 claims on its label that 'it is good to kidneys' - in Cantonese slang, kidneys refer to a man's sexual prowess.
'It was brought onto the market in November last year and 50,000 capsules have been imported,' a Department of Health spokesman said.
Authorities bought samples of Super Power 72 from a market in Mongkok after receiving a complaint.
The department is seeking legal advice as to whether the Hong Kong supplier, which it did not name, breached the Pharmacy and Poisons Ordinance.
The supplier was ordered to recall all stocks of the product within seven days and surrender them to the department.
The spokesman said: 'Members of the public who have purchased the product are advised to stop using it, dispose of the product or surrender it to the department's Pharmaceutical Service at the Public Health Laboratory Centre, 3/F, 382 Nam Cheong Street, Kowloon.'
A hotline, 2319 2839, will be operating until this afternoon.
Several Viagra copycats, sold as health or food products, have been seized in Hong Kong since 2001.
Viagra is a prescription drug. Users with heart disease and those taking nitrate-based medicine are at risk of a potentially fatal heart attack.