Three pills, one problem, wildly different price tags. That’s the short version of what I hear from guys in Singapore who message me after their first clinic visit, holding a prescription for Viagra and wondering whether Cialis or Levitra would have been the smarter buy. Fair question. A month’s supply can swing by S$60 or more depending on which one you pick, and the difference isn’t just cost. It’s how fast it kicks in, how long it lasts, and whether you can eat a plate of char kway teow beforehand without ruining the whole thing.
So I put together this comparison the way I’d explain it to a friend over kopi at a Tampines coffeeshop. Real prices, real timing, and the boring regulatory bits that actually matter.
1. Viagra (Sildenafil) — The Baseline Everyone Compares Against
Viagra 100mg and Viagra 50mg are the reference points. Onset is roughly 30 to 60 minutes. Duration sits around 4 to 6 hours. The catch: sildenafil hates fat. Have a heavy meal and absorption drops noticeably, which is why clinics usually tell you to take it on a relatively empty stomach.
Local pricing for original Pfizer stock typically runs S$18 to S$25 per 100mg tablet at a private clinic, and less per pill if you buy a box. Generic sildenafil is where the maths changes fast, often S$3 to S$6 a tablet from a licensed online source. Same active ingredient, same mechanism. If you want the deeper science, this breakdown of how sildenafil works in the body covers the blood flow side without the jargon.
2. Cialis (Tadalafil) — The Long-Game Option
Tadalafil runs 30 to 120 minutes to onset, so slower and less predictable than sildenafil for a single encounter. But it lasts 24 to 36 hours. Some men get closer to 36. That window is the entire selling point: no clock-watching, no “quick, take the pill” scramble.
It’s also less affected by food, which matters if you’re the type who eats dinner at 8pm and doesn’t want to plan around it. Cost in Singapore: original Cialis lands around S$22 to S$30 per 20mg tablet at clinics. Generic tadalafil drops to roughly S$5 to S$9. Daily low-dose tadalafil (5mg) exists too, and for men in relationships where sex isn’t scheduled, that’s often the more practical format.
3. Levitra (Vardenafil) — The Middle Child
Vardenafil sits between the two. Onset around 25 to 60 minutes, duration 4 to 8 hours. Slightly faster than sildenafil on paper, slightly longer-lasting. Some men who get headaches or flushing on Viagra report fewer side effects on Levitra, though that’s anecdotal, not a guarantee.
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Availability is the weak spot locally. Not every clinic stocks it, and original Levitra pricing runs S$20 to S$28 per 20mg tablet. Generic vardenafil is cheaper but harder to find through legitimate channels in Singapore compared to sildenafil or tadalafil generics.
4. The Comparison Table (Prices From Local Clinics and Licensed Online Sources)
| Drug | Onset | Duration | Original Brand (per tab) | Generic (per tab) |
|---|---|---|---|---|
| Viagra 100mg | 30–60 min | 4–6 hrs | S$18–S$25 | S$3–S$6 |
| Cialis 20mg | 30–120 min | 24–36 hrs | S$22–S$30 | S$5–S$9 |
| Levitra 20mg | 25–60 min | 4–8 hrs | S$20–S$28 | S$6–S$10 |
Prices are indicative as of recent checks with private clinics in Orchard and Jurong, plus licensed online sellers. They move. Don’t treat any single figure as gospel.
5. What HSA Actually Allows, And Why It Matters For Price
All three are prescription-only in Singapore under the Health Sciences Authority. No legal over-the-counter route exists, and that’s not a technicality. Buying from unlicensed overseas sites risks counterfeit product, and HSA has flagged intercepted parcels repeatedly. The price gap between brand and generic isn’t a loophole; it’s just patent expiry doing its thing.
Worth reading the local rules on sildenafil vs Viagra pricing and HSA regulations before you assume a cheap listing is legitimate. If a site sells 100mg Viagra at S$2 a pill with no prescription process, that’s a red flag, not a bargain.
6. Which One Do Singapore Men Actually Pick?
From what users report, sildenafil (brand or generic) remains the default because it’s cheapest and fastest to source. Men who travel often or have unpredictable schedules lean tadalafil. Vardenafil tends to be a third choice, usually for men who tried the other two and didn’t love the side effect profile.
One guy I spoke to in Bedok swapped from Viagra to generic tadalafil purely because he got tired of timing dinner around a pill. Cost went up slightly per month, stress went down. That’s a real trade-off, not a marketing line.
If you’re set on sildenafil, the full guide to Viagra 50mg and 100mg in Singapore covers dosing and what to expect on the first try.
7. Delivery, Support And What “Legit” Looks Like Locally
Licensed online sellers in Singapore typically dispatch within 1 to 3 working days, discreet packaging, no branding on the parcel. Customer support should be reachable by WhatsApp or email and should ask about your medical history before dispensing. If nobody asks, walk away. Clinics in places like Novena and Raffles Place usually offer same-day dispensing if you’d rather speak to a doctor face to face.
FAQ
Is generic sildenafil really as effective as Viagra?
Yes. Same molecule, same 100mg or 50mg dose. Bioequivalence is a regulatory requirement, not a marketing claim.
Can I take Viagra and Cialis together?
No. Never stack PDE5 inhibitors. Pick one and stick to it.
Which is cheapest per month in Singapore?
Generic sildenafil, by a wide margin. Generic tadalafil is second.
Does Cialis really last 36 hours?
For some men, yes. Others get closer to 24. It varies with metabolism and dose.
Do I need a prescription?
Legally, yes. HSA classifies all three as prescription-only medicines.
What if Viagra gives me headaches?
Common side effect. Some men switch to tadalafil or vardenafil and find it milder. Talk to a doctor before switching.
Can I drink alcohol with these?
Light drinking is generally fine. Heavy drinking blunts the effect and raises blood pressure risk.
Closing Thoughts
Viagra wins on price and speed of onset if you go generic. Cialis wins on flexibility and food tolerance. Levitra is a reasonable middle option if you can find it. Start with what your doctor recommends, not what’s cheapest on a random listing, and buy only from licensed local sources. The savings from generic sildenafil are real, but only if the pill in the box is actually sildenafil.