Frequently Asked Questions (FAQs) for Healthcare Providers

NITYR (nitisinone) is a formulation of nitisinone (NTBC) that is prescribed to treat patients with Hereditary Tyrosinemia Type 1 (HT-1) in combination with dietary restriction of tyrosine and phenylalanine. NITYR tablets and Orfadin®* (nitisinone) capsules are bioequivalent.1

NITYR comes in 2 mg, 5 mg, and 10 mg tablets.

Yes, NITYR contains the active ingredient nitisinone. NTBC is an abbreviation for nitisinone and the two terms mean the same thing.

Cycle Pharmaceuticals manufactures NITYR in the UK and Switzerland.

NITYR is stable at room temperature between 68°F and 77°F (20°C and 25°C), allowing for excursions between 59°F and 86°F (15°C and 30°C) until its expiry date, and so freeing your patients from having to refrigerate the medication. NITYR tablets are very small2 (baby aspirin sized) and can be taken with or without food at any time of the day.3

For younger patients or patients that can’t swallow tablets, NITYR can also be converted to a suspension and taken via an oral syringe or can be crushed and mixed with applesauce.

Watch the administration videoRead more informationFull Instructions for Use

Yes, clinical trials have demonstrated NITYR is bioequivalent to Orfadin®* capsules, which means that it has the same efficacy, safety and side effects, and may offer patients and their families greater convenience.1

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NITYR may offer patients greater convenience. NITYR tablets are very small2 (baby aspirin sized), do not require refrigeration and can be taken with or without food.3

Download the enrollment form, and either complete it digitally, ensuring all the required fields are completed, and email it to Or you can print it and complete the required fields and fax it to Cycle Vita at 888-385-8482.

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NITYR is an option for the treatment of Hereditary Tyrosinemia Type 1 (HT-1) and may offer convenience for patients. NITYR tablets are very small2, do not require refrigeration and can be taken with or without food.3

NITYR tablets are very small2 (baby aspirin sized) and can be swallowed by patients from around 3 years old. However, the ability of the patient to swallow the tablet should be established by their healthcare provider.

For those unable to swallow a tablet, NITYR can be converted to a suspension that can be administered via an oral syringe and stored for up to 24 hours at room temperature before use. If your patient can swallow soft food, NITYR tablets can also be crushed and mixed with applesauce.

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Yes, Cycle Vita is available to eligible patients**. The Cycle Vita team is available so your patients can gain advice and support with access to a pharmacist when they need help or have any questions. Home delivery and proactive refills are also provided, making this process more convenient for your patients as well. We also offer $0 co-pay for eligible** patients.

For more information please refer patients to or call 888-360-8482.

As part of Cycle’s dedication to providing NITYR to patients in an accessible and affordable manner, we provide a $0 co-pay to eligible** commercially insured patients. For more information, please contact Cycle Vita on 888-360-8482.

Cycle Vita can complete a full benefits investigation for your patients. Please complete the enrollment form and send it back to the Cycle Vita team. You and your patients will be informed of the results from the investigation to support your decision making. Enrollment forms can be faxed to 888-360-8482 or emailed to

Please contact the Cycle Vita team on 888-360-8482.

For appointments and patient materials in the US, please contact 888-360-8482. For information about NITYR availability in other countries outside of the US, please contact

* Orfadin is a registered trademark, licensed by Swedish Orphan Biovitrum AB (publ) and is marketed by Sobi, Inc.
** Some areas of support may not be accessible to all patients. Eligibility criteria may apply to ensure compliance with all applicable federal and state requirements, and benefits may be limited to commercially insured patients only. For more detailed information about eligibility, terms and conditions, please contact the Cycle Vita team at 888-360-8482.


1. Data on file: REF-00047
2. Data on file: REF-00041
3. NITYR (Nitisinone) Tablets. Prescribing Information. Cycle Pharmaceuticals Ltd