Mechanism of Action and Use of Ritlecitinib

Mechanism of Action and Use of Ritlecitinib

Ritlecitinib is a hard capsule containing 50 mg of the active substance ritlecitinib per capsule. This medicine is used to treat severe alopecia areata in adults and adolescents aged 12 years and older. Alopecia areata is an autoimmune disease in which the patient's immune system mistakenly attacks the hair follicles, causing inflammation, which leads to hair loss on the scalp, face, and other parts of the body. Ritlecitinib works by limiting the activity of two enzymes, JAK3 and TEC, which are closely associated with the inflammatory process in hair follicles. The medicine effectively reduces the inflammatory response in hair follicles, thereby promoting hair regrowth in patients with alopecia areata. It is important to note that Ritlecitinib is a medicine subject to additional monitoring to quickly gather new safety information. Doctors will also provide each patient with a patient card containing important safety precautions, which patients should carry with them at all times.

Ingredients of Ritlecitinib

The core active substance in each Ritlecitinib hard capsule is ritlecitinib (present as tosylate salt, equivalent to 50 mg of ritlecitinib). In addition to the active ingredient, the capsule contains several inactive ingredients, including microcrystalline cellulose, lactose monohydrate, crospovidone, and glyceryl behenate. Lactose is a component requiring special attention; if your doctor has told you that you have an intolerance to certain sugars, you should contact your doctor before use. The capsule shell is composed of substances such as hypromellose, titanium dioxide, yellow iron oxide, and brilliant blue FCF. The printing ink contains shellac, propylene glycol, strong ammonia solution, black iron oxide, and potassium hydroxide.

Signs of Infection to Watch for During Treatment and Preventive Measures

During treatment with Ritlecitinib, because the medicine may reduce the ability of your immune system to fight infections, you need to pay special attention to any potential signs of infection. Common signs of infection include fever, sweating, chills, muscle aches, persistent cough, difficulty breathing, coughing up blood, unexplained weight loss, diarrhea, abdominal pain, burning sensation during urination or increased frequency of urination, and extreme fatigue. If you already have an infection, Ritlecitinib may worsen it; even if you do not currently have an infection, this medicine may make you more susceptible to new infections. Special vigilance is required for the reactivation of latent infections, such as the varicella-zoster virus. If you have ever had chickenpox or shingles, the use of Ritlecitinib may cause these viruses to become active again, presenting as a painful blistering rash (shingles). In addition, if you have diabetes or are over 65 years of age, you are considered at high risk for infections, and your doctor may monitor you more closely. Before starting treatment, your doctor will definitely screen you for tuberculosis; if you have been in close contact with someone with tuberculosis or have lived in or traveled to areas where tuberculosis is common, please be sure to inform your doctor.