Extension Study to Evaluate Safety and Efficacy of CTP-543 in Adults With Alopecia Areata

To join this study, you must be an adult aged between 18 and 65 years old. A very key requirement is that you must have already taken part in and successfully completed 24 weeks (about six months) of treatment in a previous CTP-543 study.

There are some reasons why you wouldn't be able to join. For example, if you have ongoing skin conditions on your scalp such as inflammation, psoriasis, or significant dandruff (seborrheic dermatitis) that needs treatment. Also, if you have had significant injuries to your scalp or certain untreated skin growths (actinic keratosis), you wouldn't be able to participate.

For women, if you are breastfeeding, pregnant, or planning to become pregnant during the study or within 30 days after taking your last dose of the study medicine, you cannot take part. Additionally, all participants must agree not to donate blood at any time during the study and for 30 days afterwards.

If you join this study, you'll continue to take the CTP-543 medicine, which you’ve already been taking. You will have regular visits to the study clinic where the research team will check your health, measure your hair growth, and ask about any side effects you might be experiencing. These visits will involve various assessments, which might include physical examinations, blood tests, and photographs of your scalp. The exact schedule of these visits and tests will be explained to you in detail by the study staff. You'll continue to be followed up for a period after your last dose of medication. The total commitment to the study will vary depending on the specific design of this extension, but generally, extension studies can last for several months to a few years.