Private ED care · Bangkok

Tadalafil for ED: daily and as-needed treatment in Bangkok

A longer response window and the distinction between a daily plan and as-needed treatment.

The short answer

Tadalafil is the active ingredient in Talafil and Casey. It offers a longer erection-response window than sildenafil and can be prescribed as-needed or in a low-dose daily regimen. Kauri stocks tadalafil 5 mg and 20 mg products.

Available packs and prices at Kauri

ED medication packs at Kauri Health Clinic
ProductActive ingredientStrength per tabletTablets per packPack price (THB)
Talafil-5Tadalafil5 mg30฿2,550
Casey 5Tadalafil5 mg30฿1,875
Talafil-20Tadalafil20 mg4฿1,950

What does tadalafil do?

Tadalafil is a PDE5 inhibitor that supports blood flow during sexual stimulation. It can help people with ED get or keep an erection without having to plan every encounter around a short treatment window. It is not an aphrodisiac. Tadalafil is also used for some urinary symptoms in selected patients, but that requires its own medical assessment.

Daily versus as-needed tadalafil

As-needed treatment is timed before sexual activity. Low-dose daily treatment follows a regular schedule and may suit patients who need frequent treatment or prefer less planning. Kauri's 5 mg products and 20 mg product serve different prescribed plans. The doctor explains which regimen applies; 20 mg should not be treated as a routine daily ED dose.

How long does tadalafil last?

As-needed tadalafil can begin to work from around 30 minutes, with a response window lasting up to 36 hours. This describes when an erection may be easier to achieve with stimulation. It does not mean a 36-hour erection. Food has little effect on absorption. Daily treatment is assessed as a regular regimen rather than as a single timed dose.

Choosing between Talafil, Casey and other tadalafil brands

Kauri offers Talafil-5 and Casey 5 in 30-tablet packs, plus Talafil-20 in a 4-tablet pack. Cialis is a well-known tadalafil reference brand, but is not in our listed stock. When comparing products, start with the active ingredient, strength and regimen, then consider pack price, tolerability and preference with your prescriber.

Side effects: what should I know?

ED tablets are well tolerated by many patients. Headache, flushing, indigestion, nasal congestion and dizziness can occur. Sildenafil may cause temporary visual changes; tadalafil may cause back or muscle aches. Tell Kauri about troublesome effects so your treatment can be reviewed.

Who needs a medication review first?

Never combine these medicines with nitrates, poppers or riociguat. Tell your physician about heart symptoms, low blood pressure, kidney or liver conditions, eye problems and all other medicines, including alpha-blockers. Do not combine ED tablets yourself. Seek urgent care for an erection lasting 4 hours or longer, sudden vision or hearing loss, or chest pain; tell the treating team what you took and when. Do not self-administer nitrates after an ED medicine.

Private ED care at BTS Punnawithi, Bangkok

At Kauri, we review your symptoms, current medicines, previous response and preferences, then explain suitable treatment and follow-up. Relevant blood testing or specialist referral can be arranged when needed. Visit Kauri Health Clinic at BTS Punnawithi, 3063 Sukhumvit Rd, Bang Chak, Phra Khanong, Bangkok 10260. We are open Tuesday–Saturday, 9:00–18:00, and closed Sunday and Monday.

Patient questions

Tadalafil guide: frequently asked questions

Can tadalafil be taken every day?

A clinician can prescribe an appropriate low-dose daily tadalafil regimen. This is different from taking an as-needed 20 mg tablet every day. Follow your own prescription.

Can I take tadalafil with food?

Tadalafil can generally be taken with or without food. Follow the instructions provided with your prescription and avoid heavy drinking, which can affect erections and blood pressure.

Can I take sildenafil while tadalafil is still active?

Do not add sildenafil or another ED treatment yourself. Tadalafil remains in the body for an extended period, and overlapping treatments can increase adverse effects. Ask your clinician about switching.

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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.

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