The Health Sciences Authority (HSA) yesterday alerted the public against consumption of a sexual enhancement product called "VIA.X For Men".
The call comes after a routine quality surveillance of health products last September found VIA.X For Men to be "adulterated".
HSA immediately instructed health supplement store Nature's Farm, which distributes VIA.X For Men to its outlets and selected medical halls here, to stop selling the product.
HSA said in a statement that samples it tested were found to contain the undeclared potent ingredients sildenafil, typically found in Viagra, and propoxyphenyl sildenafil.
The usage of sildenafil without proper medical advice and close supervision can result in adverse side-effects such as decreased or loss of vision and hearing, and cardiovascular irregularities such as strokes and heart attacks. The other ingredient (propoxyphenyl sildenafil) is not approved for medicinal use, and can cause similar side-effects.
Nature's Farm has also conducted a voluntary consumer recall of the product.
VIA.X For Men claims to contain only natural ingredients such as red algae peptide hydrolysate, pycnogenol, L-arginine and zinc gluconate.
It is marketed as "a premium proprietary blend of scientifically proven ingredients specially made to boost performance and satisfaction".
While no adverse reactions have been reported, HSA advises those with any remaining supplies to seek medical attention if they feel unwell or are concerned about their health.
HSA said further investigations this month showed that one of Nature's Farm's distributors had not been informed to stop selling the product. HSA said it is investigating the case.
Members of the public may contact Nature's Farm on 6744-1865 should they have any enquiries.