Sidegra
Sildenafil treatment, two available strengths and a short, planned response window.
Read the guide →Private ED care · Bangkok
Tadalafil vs sildenafil: which ED treatment fits you?
Compare the two ingredients by timing, duration, meals, side effects and treatment pattern.
Compare sildenafil and tadalafil
| What matters to you | Sildenafil | Tadalafil |
|---|---|---|
| Kauri brands | Sidegra, Viagra | Talafil, Casey |
| Planning a dose | Commonly around 1 hour before sex | As-needed treatment: from around 30 minutes |
| Response window | Several hours, commonly around 4 hours | Up to 36 hours |
| Meals | A large or fatty meal can delay the onset | Food has little effect on absorption |
| Treatment pattern | Usually when needed | As-needed or a prescribed low-dose daily plan |
| Stimulation | Sexual stimulation is needed with either medicine | |
Patient questions
Tadalafil vs sildenafil: frequently asked questions
Which lasts longer: tadalafil or sildenafil?
Tadalafil generally has the longer response window, up to 36 hours. Sildenafil usually supports a response for several hours. Sexual stimulation is required with both; these are not continuous-erection durations.
Is tadalafil 20 mg equivalent to sildenafil 100 mg?
No direct milligram-for-milligram equivalence applies. They are different medicines with different duration and dosing instructions. Your clinician chooses the appropriate dose for each.
Which works better for older adults or people with diabetes?
Age or diabetes alone does not determine the best choice. Both medicines can be considered for appropriate patients, with the decision based on health, other medicines, response and tolerability.
Explore ED treatment
Medication and comparison guides
Start with a medicine you know, or compare the ingredients and treatment patterns.
Medical sources
Medicine information draws on public clinical guidance. Pack details and prices are supplied by Kauri. Content updated 16 October 2026.
Kauri Health Clinic
Find an ED treatment that fits you
Discuss your goals privately with Kauri. We explain the options, costs and next step in clear language.
General medical information. Follow your own prescription and the medicine's patient leaflet. Medication selection and dosing are individualized by the treating physician.
Explore the full picture of ED care
Understand erectile dysfunction, how assessment works and the treatment options available at Kauri—not just one medication.
View erectile dysfunction treatment