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Medically reviewed by Oliinyk Elizabeth Ivanovna, PharmD. Last updated on 26.06.2023

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Ulitas is a selective progesterone receptor modulator used for the purposes of emergency contraception (Ulitas) and for the treatment of uterine fibroids (Fibristal). It is a derivative of 19-norprogesterone and has both antagonistic and partial agonist activity at the progesterone receptor. It also binds to glucocorticoid receptor, however compared to mifepristone (a progesterone receptor antagonist), Ulitas is more tolerable and has lower glucocorticoid activity and better binding affinity. Ulitas is currently recommended as first line therapy for emergency contraception, due to improved efficacy and similar side effect profile as compared to the traditional use of levonorgestrel or the Yuzpe regimen. The exact mechanism of action for Ulitas is still currently debated, though there is evidence that it functions by inhibiting ovulation. A recent systematic review proclaimed that the majority of available evidence demonstrates an inhibitory effect on ovulation rather than a post-fertilization effect on the endometrium, which has been heavily debated due to ethical concerns related to abortion (Rosato et al, 2016).
As the product Ulitas (available in Canada and the US), Ulitas is indicated for use as emergency contraception after unprotected intercourse or possible contraceptive failure when administered within 120 hours (5 days) after unprotected intercourse or a known or suspected contraceptive failure. As the product Fibristal (available in Canada), Ulitas is indicated for treatment of the signs and symptoms of uterine fibroids in adult women. (moderate Uterine fibroid; severe Uterine fibroid;)
Ulitas is an emergency contraceptive. It works by stopping or delaying the release of an egg from an ovary. Ulitas may also make it harder for a fertilized egg to attach to the uterus.
Ulitas is used to prevent pregnancy after having sex without using a condom or other effective birth control method. Ulitas is also used to prevent pregnancy after a regular form of birth control has failed. Ulitas is not to be used as a regular form of daily, weekly, or monthly birth control.
Ulitas SHOULD NOT BE USED TO TERMINATE AN EXISTING PREGNANCY.
Ulitas may also be used for purposes not listed in this medication guide.
Instruct patients to take one tablet orally as soon as possible within 120 hours (5 days) after unprotected intercourse or a known or suspected contraceptive failure.
The tablet can be taken with or without food.
If vomiting occurs within 3 hours of Ulitas intake, consideration should be given to repeating the dose.
Ulitas can be taken at any time during the menstrual cycle.
How supplied
Dosage Forms And Strengths
The Ulitas tablet is supplied as a white to off-white, round, curved tablet containing 30 mg of Ulitas and is marked “Ulitas” on both sides.
Storage And Handling
Ulitas (Ulitas) tablet, 30 mg is supplied in a PVC-PE-PVDC-aluminum blister. The tablet is a white to off-white, round, curved tablet marked with “Ulitas” on both sides.
NDC 50102-911-01 (1 tablet unit of use package)
Store at 20-25°C (68-77°F).
Keep the blister in the outer carton in order to protect from light. Keep out of reach of children.
For all medical inquiries contact: Afaxys, Inc. Health and Safety Team Charleston, SC, 29403, USA. 1-855-888-2467. Distributed By: Afaxys, Inc. Charleston, SC, 29403, USA. Revised: March 2015
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What is the most important information I should know about Ulitas?
Ulitas: Pregnancy (known or suspected)
Canadian labeling: Additional contraindications (not in US labeling):Hypersensitivity to Ulitas or any component of the formulation
Fibristal [Canadian product]: Hypersensitivity to Ulitas or any component of the formulation; pregnancy; breastfeeding; genital bleeding of unknown etiology or for reasons other than uterine fibroids; cancer of the breast, cervix, uterus, or ovaries; hepatic disease (current or history of)
Use Ulitas as directed by your doctor. Check the label on the medicine for exact dosing instructions.
- An extra patient leaflet is available with Ulitas. Talk to your pharmacist if you have questions about this information.
- Take Ulitas by mouth with or without food.
- Keep Ulitas in its original packaging until you are ready to take it. Do not take it if the package is torn or broken.
- Take Ulitas as soon as possible after known or suspected birth control failure or after you have unprotected sexual intercourse. The dose must be taken within 120 hours (5 days), or as directed by your doctor.
- Ulitas can be used any time during the menstrual cycle.
- If vomiting occurs within 3 hours after taking Ulitas, talk with your health care provider to discuss whether to repeat that dose.
- If you are unsure about your general health or pregnancy status, a follow-up physical or pelvic exam may be needed after taking Ulitas.
- If you miss a dose of Ulitas, contact your doctor right away.
Ask your health care provider any questions you may have about how to use Ulitas.
There are specific as well as general uses of a drug or medicine. A medicine can be used to prevent a disease, treat a disease over a period or cure a disease. It can also be used to treat the particular symptom of the disease. The drug use depends on the form the patient takes it. It may be more useful in injection form or sometimes in tablet form. The drug can be used for a single troubling symptom or a life-threatening condition. While some medications can be stopped after few days, some drugs need to be continued for prolonged period to get the benefit from it.Ulitas is used in adult women of childbearing age to relieve moderate to severe symptoms of uterine fibroids (non-cancerous tumors of the womb) either before the surgery for fibroids or for long term treatment. It is also used as an emergency contraception to prevent pregnancy after unprotected sexual intercourse or known contraceptive failure.
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What other drugs will affect Ulitas?
Barbiturates: May decrease the serum concentration of Ulitas. Avoid combination
Bosentan: May decrease the serum concentration of Ulitas. Avoid combination
CYP3A4 Inducers (Moderate): May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy
CYP3A4 Inducers (Strong): May decrease the serum concentration of Ulitas. Avoid combination
CYP3A4 Inhibitors (Moderate): May increase the serum concentration of Ulitas. Management: This is specific for when Ulitas is being used for signs/symptoms of uterine fibroids (Canadian indication). When Ulitas is used as an emergency contraceptive, patients receiving this combination should be monitored for Ulitas toxicity. Avoid combination
CYP3A4 Inhibitors (Strong): May increase the serum concentration of Ulitas. Management: This is specific for when Ulitas is being used for signs/symptoms of uterine fibroids (Canadian indication). When Ulitas is used as an emergency contraceptive, patients receiving this combo should be monitored for Ulitas toxicity. Avoid combination
Dabrafenib: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Management: Seek alternatives to the CYP3A4 substrate when possible. If concomitant therapy cannot be avoided, monitor clinical effects of the substrate closely (particularly therapeutic effects). Consider therapy modification
Deferasirox: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy
Efavirenz: May decrease the serum concentration of Ulitas. Avoid combination
Erdafitinib: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy
Felbamate: May decrease the serum concentration of Ulitas. Avoid combination
Griseofulvin: May decrease the serum concentration of Ulitas. Avoid combination
Ivosidenib: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy
OXcarbazepine: May decrease the serum concentration of Ulitas. Avoid combination
Progestins: Ulitas may diminish the therapeutic effect of Progestins. Progestins may diminish the therapeutic effect of Ulitas. Management: Ulitas for uterine fibroids (Canadian indication): avoid progestins within 12 days of stopping Ulitas; as emergency contraceptive (U.S. indication): avoid progestins within 5 days of stopping Ulitas. Avoid combination
Sarilumab: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy
Siltuximab: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy
St John's Wort: May decrease the serum concentration of Ulitas. Avoid combination
Tocilizumab: May decrease the serum concentration of CYP3A4 Substrates (High risk with Inducers). Monitor therapy
Topiramate: May decrease the serum concentration of Ulitas. Avoid combination
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What are the possible side effects of Ulitas?
Abdominal pain, Dizziness, Pain during periods, Fatigue, Headache, Nausea, Intermenstrual bleeding