There are several pharmacy chains in Singapore (found all throughout singapore) as well as stand alone pharmacies in hospitals as well as other places like the Mustafa center.
A few Hospital Pharmacies
Mount Elizabeth pharmacy +65 6737-2666
Singapore General Hospital +65-6326-6614
level 1 Mustafa Center, 145 Syed Alwi Road, Singapore 207704
Tel +65-62955855
The Mustafa Center is open 24 hours a day, 7 days a week.
Common chain pharmacies
Guardian pharmacy - pharmacy locator : https://www.guardian.com.sg/store-finder
Watsons Pharmacy - pharmacy locator : https://www.watsons.com.sg/store-finder
Guardian Pharmacy Paragon
# B1-20/24, 290 Orchard Road, Paragon, Singapore 238859
Opening Hours: Mon - Sun, 9:00 AM - 10:00 PM
Tel +65- 6737 6282 / +65-6732 6762
Pharmacist Available Mon - Sun, 9:00 AM - 10:00 PM
Watsons Pharmacy City Square Mall, Farrer Park
180 Kitchner Road, #02-31, Serangoon, Singapore 208539
Opening Hours Mon-Sun 10:00 am -10:00 pm
Tel 65096098