How to access Crysvita for X-linked hypophosphatemia or tumor-induced osteomalacia from the UAE: 2026 pathway via UAE paediatric endocrinology, adult metabolic bone, and oncology coordination
Reviewed by the Reserve Meds clinical operations team. Last reviewed: 2026-05-20.
The UAE has one of the deepest paediatric endocrinology, adult metabolic bone, nephrology, and oncology networks in the wider region for the management of rare bone-mineral disease. Cleveland Clinic Abu Dhabi runs a paediatric endocrinology service with genetic-disease programme depth and an adult endocrinology service and Sheikh Khalifa Medical City hold paediatric endocrinology programmes; Tawam Hospital runs paediatric endocrinology with regional referral depth; American Hospital Dubai and Mediclinic City Hospital handle both paediatric and adult endocrinology, with adult metabolic bone clinics covering osteomalacia, osteoporosis, and FGF23-driven phosphate-wasting disorders; the UAE EDE governs imported-medicine registration for rare-disease indications. Crysvita (burosumab-twza, Ultragenyx Pharmaceutical with Kyowa Kirin as ex-US partner) is the anti-FGF23 humanized IgG1 monoclonal antibody, dosed subcutaneously every 2 to 4 weeks, that targets the genetic mechanism of X-linked hypophosphatemia (XLH) and the acquired mechanism of tumor-induced osteomalacia (TIO). For a UAE-resident child aged 6 months and older with genetic or biochemical XLH, an adult with XLH continuing into adulthood, or an adult with TIO awaiting or following tumor resection, the operational question is no longer whether anti-FGF23 therapy is reachable: it is whether the case meets the prescribing criteria, how the discontinuation of conventional oral phosphate and active vitamin D is sequenced, what insurance will and will not cover, and how the monthly phosphorus-monitoring rhythm fits into UAE family life.
This page explains how the pathway works in 2026 for a UAE-resident patient with XLH or TIO: who qualifies, where the prescribing paediatric endocrinologist or adult metabolic bone specialist conversation happens, how Crysvita is dispensed and stored, what the dose-titration rhythm looks like over the first year, how the written quote works, what to monitor, and how the years-long treatment course fits into a UAE family's routine. It is plain-language documentation written for a family already in conversation with a treating paediatric endocrinologist, adult metabolic bone specialist, or oncology team who wants the operational reality laid out plainly.
Ask about Crysvita in UAE
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Why Crysvita, and why now
Crysvita is burosumab-twza, a humanized IgG1 monoclonal antibody that binds and neutralises fibroblast growth factor 23 (FGF23). In XLH, an inactivating mutation in the PHEX gene on the X chromosome causes circulating FGF23 to be inappropriately elevated. Excess FGF23 reduces phosphate reabsorption at the renal proximal tubule and suppresses renal 1-alpha-hydroxylase, leading to chronic phosphate wasting, low serum phosphorus, low active 1,25-dihydroxyvitamin D, defective bone mineralisation, paediatric rickets, short stature, dental abscess vulnerability, and adult osteomalacia with bone pain, fractures, and enthesopathy. In TIO, a mesenchymal phosphaturic tumor secretes FGF23 ectopically and produces the same biochemical and skeletal picture in an adult who did not have it as a child.
The historic conventional therapy for XLH was lifelong high-dose oral phosphate salts in multiple daily doses combined with active vitamin D analogs (calcitriol or alfacalcidol), titrated to suppress secondary hyperparathyroidism without overshooting into hypercalciuria and nephrocalcinosis. Conventional therapy is partially effective, requires multiple daily doses, often produces gastrointestinal intolerance, and does not address the underlying FGF23 excess. Crysvita addresses the upstream mechanism. The clinical translation is improvement in serum phosphorus toward the lower-normal range within 4 to 8 weeks of starting, improvement in paediatric radiographic rickets scores over 1 to 2 years, improvement in height velocity in growing children, and reduction in adult bone pain and stiffness over months. The FDA approved Crysvita for paediatric XLH age 1 year and older in April 2018, for adult XLH in September 2018, expanded the paediatric XLH label to age 6 months and older in March 2020, and added the TIO indication for patients age 2 years and older in June 2020.
Reserve Meds does not advocate Crysvita over conventional therapy in cases where conventional response is adequate. The page describes the Crysvita pathway because Crysvita is the therapy the family has asked about.
What Crysvita is, in plain language
Crysvita is a subcutaneous injection given every 2 to 4 weeks. There is no infusion centre, no inpatient stay. After a supervised first dose at the prescribing endocrinology clinic, the family or patient is trained for home self-injection in subsequent cycles, although many UAE families opt for clinic-administered dosing for the first several cycles. The injection vials are 10 mg, 20 mg, and 30 mg single-dose presentations; the dispensed dose is calculated by weight and titrated by serial phosphorus measurement. Paediatric XLH starting dose is 0.4 to 0.8 mg per kg every 2 weeks, titrated upward to a typical maintenance of approximately 0.8 to 1.2 mg per kg every 2 weeks based on serum phosphorus response. Adult XLH dosing is 1 mg per kg every 4 weeks, capped at 90 mg. TIO dosing is weight-based every 2 weeks, similar to paediatric XLH.
This is not a short-course therapy. XLH is a lifelong genetic condition; Crysvita is taken for as long as it controls the phosphate-wasting biochemistry and the family elects to continue. TIO patients may discontinue if and when the underlying tumor is fully localised and resected with biochemical cure.
Eligibility at a UAE paediatric endocrinology or adult metabolic bone clinic
For UAE-resident patients, the paediatric and adult services apply the FDA-label and EMA-label eligibility with local adaptation:
1. Confirmed diagnosis. For XLH: genetic confirmation of a PHEX mutation, OR a clinically compatible picture (low serum phosphorus, normal serum calcium, elevated alkaline phosphatase, elevated FGF23, low or low-normal 1,25-dihydroxyvitamin D) with a positive family history. For TIO: an adult patient with acquired hypophosphatemia, elevated FGF23, oncology team coordination for tumor localisation (Ga-68 DOTATATE or octreotide-based functional imaging plus anatomic localisation), and a resection plan that has either failed, is delayed, or is not yet possible. 2. Age. Paediatric XLH age 6 months and older. Adult XLH age 18 and older. TIO age 2 and older. 3. Baseline biochemistry. Serum phosphorus, calcium, alkaline phosphatase, 1,25-dihydroxyvitamin D, 25-hydroxyvitamin D, intact parathyroid hormone, urine phosphate (fractional excretion of phosphate or tubular reabsorption of phosphate), creatinine and eGFR. 4. Discontinuation plan for conventional therapy. Oral phosphate supplements and active vitamin D analogs (calcitriol, alfacalcidol) must be discontinued before Crysvita is started. This is essential. Crysvita raises endogenous serum phosphorus by restoring renal reabsorption; adding exogenous phosphate or active vitamin D on top causes hyperphosphatemia and the risk of ectopic calcification. 5. Renal imaging baseline. Renal ultrasound to document baseline nephrocalcinosis status (a known complication of years of conventional therapy in XLH). 6. Hypersensitivity history review. 7. Pregnancy planning discussion for women of childbearing potential.
A UAE family should arrive at the prescribing conversation with: the paediatric endocrinology or adult metabolic bone documentation, the genetic test result if available (PHEX sequencing) or the family-history pedigree, the most recent serum phosphorus / calcium / ALP / vitamin D / PTH panel, the radiographic rickets score documentation in paediatric cases or skeletal survey in adults, the complete conventional therapy history with doses and durations, and the insurance preauthorisation paperwork.
The UAE prescribing and supply picture, plainly
Crysvita UAE EDE registration status is verified at intake. Ultragenyx commercial supply runs through regional distributors; Kyowa Kirin handles ex-US distribution in many MENA markets. Where in-country registration is complete, in-country pharmacy dispensing applies. Where registration has not yet caught up, the named-patient European-import pathway covers the case. The pathway is:
1. Prescribing physician: a board-certified UAE paediatric endocrinologist (for paediatric XLH and paediatric TIO) or adult endocrinologist with metabolic bone expertise (for adult XLH and adult TIO). The UAE services include Cleveland Clinic Abu Dhabi paediatric and adult endocrinology with the genetic-disease programme, Sheikh Khalifa Medical City paediatric endocrinology, Tawam Hospital paediatric endocrinology, American Hospital Dubai endocrinology, Mediclinic City Hospital endocrinology, and Burjeel Medical City. For TIO cases, oncology team coordination at Cleveland Clinic Abu Dhabi, Burjeel Medical City, or Tawam Hospital is required for tumor localisation and resection planning. 2. Pharmacy dispensing: hospital pharmacy with cold-chain refrigeration. Crysvita must be stored at 2 to 8 degrees Celsius; do not freeze; protect from light. 3. Insurance preauthorisation: Thiqa coverage for Emirati nationals has historically extended to rare-disease therapy on a case-by-case basis. Daman and the major commercial insurers (Oman Insurance, AXA Gulf, MetLife, Cigna, others) require documentation of confirmed diagnosis, prior conventional therapy course, and the prescribing endocrinologist's clinical rationale. 4. Conventional therapy discontinuation: the most important operational gate. The prescribing endocrinologist sequences discontinuation of oral phosphate supplements and active vitamin D analogs in the days before the first Crysvita dose. Phosphorus and calcium are monitored at baseline, at week 2, and serially thereafter. 5. Self-injection or clinic injection training: typically supervised first dose at the clinic, then a training session if the family elects home administration. Many UAE families prefer clinic-administered dosing for the first 6 to 12 months. 6. Ongoing monitoring: serum phosphorus, calcium, alkaline phosphatase, 1,25-dihydroxyvitamin D, PTH at week 2, week 4, then monthly during titration, then every 3 months during maintenance. Renal ultrasound annually. Paediatric height and rickets-score reassessment every 6 months.
Cost and quotes
Dosing is weight-based, so the cost depends on body weight. Medicine price: quote on request. You get a written quote for your case before you commit. TIO adult dosing follows the paediatric weight-based every-2-week pattern. Medicine price: quote on request. You get a written quote for your case before you commit. Insurance preauthorisation reduces out-of-pocket exposure substantially for covered patients; the financial-readiness conversation with the prescribing office happens in parallel with the clinical-readiness conversation.
What to expect on Crysvita
Serum phosphorus moves toward the lower end of the age-appropriate normal range within 4 to 8 weeks. In paediatric XLH patients, the radiographic rickets score improves over 1 to 2 years, height velocity improves over the first 12 months, and bowing of the lower extremities slowly remodels. In adult XLH patients, bone pain reduces over months, stiffness improves, and stress-fracture healing accelerates. In TIO patients, biochemical correction precedes definitive surgical tumor resection if resection is delayed, and serves as a bridge.
The most common adverse events are injection-site reactions (very common, usually mild), headache, restless legs symptoms, dizziness, and rarely hypersensitivity. Hyperphosphatemia is possible if conventional therapy is not properly discontinued or if dose titration overshoots; this is why serial phosphorus monitoring is the central operational discipline.
When Crysvita is the wrong drug
Crysvita is the wrong drug for hypophosphatemia that is not FGF23-mediated (nutritional, refeeding, dialysis-related, Fanconi syndrome from drug toxicity, autosomal dominant hypophosphatemic rickets unless FGF23 confirmed elevated). It is the wrong drug in severe renal impairment with elevated serum phosphorus at baseline, in familial-tumoral-calcinosis-like states with hyperphosphatemia, and where the family cannot reliably attend the monthly phosphorus-monitoring visits required for safe titration. For TIO, definitive surgical resection of the localised tumor remains the preferred curative pathway; Crysvita is for cases where the tumor cannot be localised, cannot be fully resected, or where surgery is delayed.
Abu Dhabi and Dubai
This guide covers the whole UAE, including Abu Dhabi and Dubai. At federal level, medicines are regulated by the Emirates Drug Establishment (EDE) and the Ministry of Health and Prevention (MOHAP). MOHAP also issues permits to import medicines for personal use. Hospitals, clinics and doctors are licensed by the health authority of their own emirate: the Department of Health Abu Dhabi (DoH) in Abu Dhabi, and the Dubai Health Authority (DHA) in Dubai.
In practice, the hospital that treats you follows the rules of its own emirate, so the paperwork is prepared for that hospital. Tell us which hospital or doctor is treating you, in Abu Dhabi, Dubai or another emirate, and we prepare the document pack for that route.
Sources: Department of Health Abu Dhabi; Dubai Health Authority, Health Regulation Sector; MOHAP, permit to import medicines for personal use; Simmons & Simmons, UAE pharmaceutical law and the Emirates Drug Establishment.
What Reserve Meds does on this case
We are a US-based digital health company. We are not the prescriber and not the dispensing pharmacy. On a UAE Crysvita case we build the documentation pack with the treating paediatric endocrinologist or adult metabolic bone specialist office, confirm UAE EDE registration status and the appropriate dispensing pathway, run the insurance preauthorisation conversation, coordinate the cold-chain supply logistics, organise the conventional-therapy discontinuation sequencing with the prescribing office, and stay with the case through the first year of titrated dosing with handoff to the local prescriber for ongoing surveillance. Clinical decisions remain with your treating endocrinologist or metabolic bone team.
Illustrative example cases (composites, not real patients). This content is for general information and does not constitute medical advice. Reserve Meds is a digital health company. Medicines are supplied through a US-licensed pharmaceutical wholesale partner. We are not the prescriber and not the dispensing pharmacy. Clinical decisions remain with your treating endocrinologist or metabolic bone team.
Reviewed by the Reserve Meds clinical operations team. Last reviewed: 2026-05-20.
Frequently asked questions
How can I get Crysvita in the UAE if it is not approved or available there?
Reserve Meds coordinates US-sourced Crysvita for patients in the UAE through a legal named-patient pathway, working with your treating doctor. Your treating physician provides the prescription and clinical justification; Reserve Meds prepares the named-patient documentation for the UAE and arranges DSCSA-compliant US sourcing and delivery to your physician or hospital pharmacy.
Can I access Crysvita in the UAE through a named-patient import?
Often, yes. Named-patient access (sometimes called personal import) is the legal route we use for FDA-approved medicines such as Crysvita. It is different from compassionate use, which covers investigational medicines through the manufacturer's own program; we do not supply investigational medicines. Eligibility and paperwork depend on the regulator in the UAE, and Reserve Meds maps the specific pathway for each market it coordinates.
Do I need a prescription to access Crysvita in the UAE through Reserve Meds?
Yes. Reserve Meds is not a pharmacy and does not prescribe. A valid prescription and clinical justification from your treating physician are required, and all clinical decisions remain with your physician.
How does Reserve Meds deliver Crysvita to a patient in the UAE?
Medicines are supplied through a US-licensed pharmaceutical wholesale partner, and Reserve Meds coordinates delivery of Crysvita to your treating physician or hospital pharmacy in the UAE, with appropriate handling for the product.
How long does it take, and what does Crysvita in the UAE cost through Reserve Meds?
After a short intake, the clinical team responds within one business day with case-specific feasibility, an indicative timeline, and a formal written quote. Cost depends on the destination, the prescribed regimen, and the duration of therapy, and is confirmed in writing before anything proceeds.
How do I start a request for Crysvita in the UAE?
Submit a 60-second intake through the Reserve Meds patient portal, or message our team on WhatsApp. We reply within one business day. On WhatsApp we usually reply the same day.