Biologics in Thailand — the same syringe, a different bill

An American on Ilumya pays about $17,552 a syringe at the US cash price (drugs.com's published figure), four syringes a year, and fights the insurer for every one of them. The rumor that the same drug costs "under $2,000" in Thailand turns out to be true and undersold: a Thai dermatology clinic publishes ILUMYA at 42,000 baht — about $1,200 — per injection, on a price list anyone can read (Crystal Clinic's psoriasis page). Same molecule, same brand name, registered with Thailand's own FDA, with a Thai-language package insert on file at MIMS Thailand.

This page is the roster — drug by drug, for every major biologic, read from Thai FDA registrations, MIMS Thailand, the Thai dermatology literature, and clinics' own published price lists, with the source attached to every number. Prices are as published or as patients reported them, labeled which; confirm in writing before you fly.

Not medical advice — Defiant is a concierge, not your dermatologist. Nothing here says what anyone should inject, switch to, or stop; a biologic is serious medicine and staying on the right one is a conversation between you and a physician. This page is about where the same molecule is sold, what the sellers publish, and what the border rules actually say.

The arithmetic, up front

Ilumya is dosed once every twelve weeks — four injections a year.

• US cash price: ~$17,552 × 4 = ~$70,000 a year (before the insurance fight).
• Thai published price: 42,000 baht × 4 = 168,000 baht ≈ $4,800 a year, plus

a dermatologist consult and first-time labs (roughly 5,000–12,000 baht, once) and a hospital's administration fee when they inject it (patients report ~2,000–3,000 baht a visit).

Four round-trip tickets fit inside that difference several times over. That is the whole page in two bullets; everything below is the detail, the exceptions, and the paperwork.

The words to know

ยาชีววัตถุ (yaa chee-wa-wat-thu — "biological medicine") is a biologic; the psoriasis kind lives in the แผนกผิวหนัง (pha-naek phiu-nang, dermatology department) of a hospital, or a stand-alone คลินิกผิวหนัง (khlinik phiu-nang, dermatology clinic). Psoriasis itself is โรคสะเก็ดเงิน (rok sa-ket ngoen — "silver-scale disease," which is better naming than the Greek managed). As with the estradiol lesson, walk in with the molecule name — tildrakizumab, secukinumab, dupilumab — not the US brand; sometimes the Thai market carries a different label for the identical drug (secukinumab circulates here both as Cosentyx and as Scapho, its Asian trade name).

The roster — what Thailand stocks, drug by drug

The anchor source is the Thai dermatology profession itself: a 2025 review by four Thai university dermatologists lists exactly which psoriasis biologics are "currently available in Thailand" (Asian Pacific Journal of Allergy and Immunology 43:410–421). Cross-checked against MIMS Thailand registrations and published Thai prices:

Published = a price list you can read yourself today. Patient-reported = a number a real patient posted with a date and a hospital name — useful, dated, and not a quote. Every biologic on this table is prescription medicine dispensed through hospitals and clinics; none of it sits on a pharmacy shelf.

And the ones Thailand does not have — we tell you when the answer is no

• Bimzelx (bimekizumab), Sotyktu (deucravacitinib), Tezspire

(tezepelumab), Evenity (romosozumab), Ocrevus, Tysabri, Cimzia — no Thai registration we could find. If you're on one of these, Thailand is not currently your refill.

• Skyrizi (risankizumab) is ambiguous: MIMS Thailand carries the molecule

monograph, but the Thai dermatologists' available-in-Thailand table omits it and no Thai seller surfaces. Treat it as unavailable until a hospital quotes you in writing.

• A switch from an unavailable biologic to an available one is exactly the decision

this page refuses to make for you — that conversation belongs to you, your US prescriber, and the Thai dermatologist, ideally before anyone books anything.

How a cash patient walks in

Thai dermatologists prescribe biologics the same way US ones do — after their own workup. Expect the standard pre-biologic panel (blood count, liver and kidney function, hepatitis B and C, HIV, a TB test, chest X-ray — the same list Siriraj's hospital site describes), roughly 5,000–12,000 baht at private rates, then the drug per dose. Patients already mid-therapy report smooth continuation: one described walking into Bumrungrad on Cosentyx and walking out with the next dose — the two pens at 24,000 baht plus about 2,200 baht in nursing and hospital charges (ASEAN NOW psoriasis thread, July 2024). Bring your records: the diagnosis, what you've failed, what you're on, your last labs.

Three kinds of desk, three price levels:

• Private hospitals (Bumrungrad, Bangkok Hospital, Samitivej, and their peers) —

walk-in, English-speaking, same-week, and the highest markup on the drug itself.

• University and government hospitals (Siriraj, Chulalongkorn, Ramathibodi; in

Chiang Mai, Maharaj/Suandok and its private wing Sriphat) — foreigners register as cash patients with a passport and pay the posted price. The cheapest secukinumab sighting on record — 13,882 baht for the monthly dose — came from a government hospital. The trade: early queues, more Thai, longer waits for a first appointment.

• The Institute of Dermatology (สถาบันโรคผิวหนัง) in Bangkok — the government's

dedicated skin hospital, where a patient reported Tremfya at 70,000 baht against the private clinic's 85,000.

Chiang Mai specifically

The published numbers above come mostly from Bangkok and the provinces; Chiang Mai's own counters are thinner on paper. What exists: Chiangmai Ram was the source of the 34,000-baht Remicade vial report; Sriphat Medical Center is the university hospital's private wing and the natural first appointment for a farang cash patient with a chronic condition. No Chiang Mai desk publishes a biologic price list we can link yet — so this is exactly the case for a written quote before you fly, which is the kind of thing we do for a living.

Four trips a year — or one visa

A quarterly biologic sets a rhythm: fly in, inject, fly home, repeat. At Ilumya prices the four-trip version still wins by tens of thousands of dollars. But Thailand also built a visa for exactly this rhythm — the DTV medical track lets you stay long-term for treatment instead of commuting to it. If the math of your life allows it, one residence beats four itineraries: here's how the DTV works.

Flying home with it

The precise version, because forums get this wrong in both directions:

• What US law says: importing drugs not FDA-approved for US sale is prohibited —

and a Thai-market box of a US-approved drug legally counts as unapproved (foreign facility, foreign labeling). FDA's personal-importation discretion (the ~90-day policy) was written for drugs unavailable in the US, which a psoriasis biologic is not. So: no, there is no rule that blesses it.

• What actually happens: CBP's own traveler guidance runs looser — declare it,

original packaging, prescription and doctor's letter in your name, personal quantity. Enforcement attention goes to mail shipments and commercial quantities. We found no documented case of a traveler's declared personal biologic being seized — and also no promise it can't be. It is discretion, not a right. Decide with eyes open.

• The cold chain is the real gatekeeper. Every drug on this page lives at

2–8°C, and each has a published once-only room-temperature allowance: Ilumya — 30 days (one of the most travel-tolerant biologics made), Stelara 30 days, Skyrizi / Dupixent / Humira 14 days, Entyvio 7 days, Taltz ~5 days, Cosentyx 4 days, Xolair 48 hours, Tremfya 4 hours (effectively untransportable without a validated cooler). Read the leaflet in your own box before trusting any number here — labels change, and the leaflet outranks this page.

• At the checkpoint: medically necessary liquids and gel ice packs are exempt

from the 100ml rule, even part-melted, syringes fly with the medicine, and all of it rides carry-on — a checked hold can freeze a biologic, which ruins it as surely as heat. The Thailand-side rules, both directions, live on our flying-with-meds page.

Bringing yours in

Coming the other way — arriving in Thailand with your own biologic mid-course — is the easy direction. A biologic is ordinary prescription medicine to Thai customs (ยาอันตราย, "dangerous drug" class — a pharmacy term, not an accusation), not a controlled substance: the 30-day personal lane applies. Original packaging, prescription or doctor's letter in your name, carry-on with a cool-bag. Inference — the guidance counts days of supply, and nobody has published how that counts a single syringe that covers twelve weeks; carry the prescription showing the dosing interval and let the paper do the talking. The full lane-by-lane walkthrough is here.

The other maps — India and China, briefly

• India became the 36th Ilumya market in December 2025 — launched by Sun Pharma,

the drug's own maker, at ₹84,375 (~$1,000) per dose (Business Standard). India also runs the world's deepest biosimilar shelf: adalimumab from ~₹5,000 (~$60) a syringe, rituximab, omalizumab, denosumab biosimilars at similar fractions — legitimate, at licensed pharmacies, with an Indian prescription. Notably, what India doesn't legally stock: Skyrizi, Taltz, and Tremfya are unregistered there.

• China's hospital prices after national reimbursement negotiations are lower

still on paper — secukinumab about ¥870 (~$120) per 150mg — but those are prices inside the Chinese hospital system, and we found no clean path for a visiting foreigner; treat China as a data point, not a plan.

• Do not buy these from a B2B marketplace. IndiaMART and Alibaba both return

listings for these molecules — including sellers offering drugs that aren't registered in their own country, "manufacturer" claims that are provably false, and prices 88% below the legal maximum, which is not a bargain but a tell. The two best-documented cases of marketplace-sourced injectables ended in a WHO alert for falsified Ozempic) and a CDC investigation of counterfeit Botox. An injectable with no verifiable cold chain and no licensed seller is not the same product at a better price; it is a different product. The clean channel is a licensed clinic in a country where the drug is registered — which is exactly what Thailand is, at prices already in India's neighborhood.

What your US insurance will and won't do

Straight answers, before you book anything:

• Medicare cannot pay for drugs dispensed abroad — by statute, not by mood.

Private plans almost never cover foreign pharmacies; a few reimburse out-of-network claims with receipts (FEHB plans for federal employees genuinely do). HSA and FSA money cannot be used for medicine bought in another country. Plan to self-pay Thai prices; that is the premise of the math, and the math holds anyway.

• Veterans: if your condition is service-connected, the FMP reimburses care

abroad — the walkthrough is at our FMP page.

• Before you fly, know what you're leaving on the table at home. With

commercial insurance, the manufacturer copay cards ($0–$5/dose for Ilumya, Skyrizi, Tremfya) can beat any airfare — Medicare and Tricare patients are excluded from those by federal rule, which is often exactly why people end up reading pages like this one. Uninsured under 400% of the federal poverty line: Sun Pharma's Ilumya Support program exists. Denied or delayed coverage on Bimzelx: UCB hands it over at $15/dose for up to two years while you appeal. And Humira and Stelara now have US biosimilars at 80–92% off list. Sometimes the answer is a program, not a plane — we'd rather tell you that than sell you a trip.

FAQ

Is Ilumya really available in Thailand?

Yes — registered with the Thai FDA under the ILUMYA brand, with a Thai package insert, listed by Thai dermatologists among the biologics available in the country, and published on at least one clinic's price list at 42,000 baht per 100mg injection.

Do I need a Thai prescription?

Yes. Every drug on this page is prescription medicine dispensed through hospitals and specialty clinics. A Thai dermatologist will do their own workup (or read your records and recent labs) and prescribe; patients mid-therapy report this as routine.

Can I skip the doctor and buy it at a pharmacy?

No — and you wouldn't want to. Biologics need an unbroken 2–8°C cold chain and are not retail-shelf products in Thailand. The hospital pharmacy hands it over cold and injects it properly. Anyone offering these molecules outside that channel is offering provenance you cannot verify.

Is it the same drug as at home?

Same molecule, same originator manufacturer, in Thai-registered packaging — that's what the Thai FDA registration means. Where Thailand carries a different trade name (Scapho for Cosentyx) or a biosimilar (Amgevita for Humira, Remsima for Remicade), this page says so.

Can I take a year's supply back to the US?

US law doesn't authorize it, and the FDA's 90-day discretion policy technically doesn't cover drugs that are available in the US. In practice, declared personal quantities with a prescription pass; commercial quantities and mail shipments are where enforcement lives. The fuller answer, including each drug's out-of-refrigeration window, is in the flying-home section above.

What does a year of Ilumya in Thailand actually cost?

At the published clinic price: 168,000 baht for four injections, plus one workup (~5,000–12,000 baht) and small per-visit fees — call it $5,000–6,000 all-in, against roughly $70,000 US cash. Get every number in writing before you fly; prices here are as published or as patients reported them, not quotes.

Want it handled?

Defiant can get you the written quote from a named hospital — the drug, the administration fee, the consult, in baht, on letterhead — book the dermatologist, send your records ahead, and sit the language gap with you. A quarterly rhythm is the easiest kind of trip to run twice and then run on rails. That's the concierge page — or start with a message.

Sources: Thai FDA drug registrations (pertento.fda.moph.go.th / ndi.fda.moph.go.th); MIMS Thailand product listings; Chularojanamontri et al., Asian Pac J Allergy Immunol 2025;43:410–421 (the available-in-Thailand table); Crystal Clinic published psoriasis price list; ASEAN NOW patient reports (2019–2024, dated inline); HDmall package listings; drugs.com and manufacturer disclosures for US list prices; US FDA personal-importation policy and CBP traveler guidance; each drug's US prescribing information for storage windows; WHO Medical Product Alert N°2/2024; CDC HAN-00507. Prices move and labels change — every figure here is as published on its source date, and a written quote from the hospital outranks this page.

Reviewed 31 Aug 2026 by the Defiant team · every price is confirmed in writing before you book.