Most of them looked to be at least 40 years of age. Viagra works by regulating chemicals in your blood and does not increase your sex drive. But go to its official Viagra. There are other drugs that you can take apart from Viagra, such as Levitra and Cialis. Business seemed slow, however, with only two people stopping by at their tables in the space of 45 minutes. But for many, these issues are outweighed by the results. It was first approved for use in Singapore in , as a prescription-only drug which cannot be bought over the counter in pharmacies.Some of the purported Viagra pills for sale in Geylang show a dosage of mg, when legitimate ones usually come in dosages of 25mg to mg. (Photo: Aqil Haziq Mahmud). Check requirements now. Find out whether you will need to apply for an approval before bringing in your personal medications when travelling to Singapore. 3 subscribers in the Singaporemenshealth community. Your go-to space for all things related to men’s well-being in Singapore. Whether you’re looking.