Drug
Ritlecitinib
Important: Reactions below are the flagged terms from this drug’s
FAERS report history (min. 3 co-reports per term) — PRR/ROR indicate
disproportionality in spontaneous reporting, not causation.
Data from FDA FAERS via openFDA. Last recalculated: 2026-09-14.
| Reaction | Co-reports (a) | PRR | ROR | Signal | |
|---|---|---|---|---|---|
| 1 | Therapeutic Product Effect Incomplete | 134 | 21.4 | 23.0 | signal |
| 2 | Blood Creatine Phosphokinase Increased | 33 | 12.7 | 12.9 | signal |
| 3 | Hair Colour Changes | 9 | 8.1 | 8.1 | signal |
| 4 | Folliculitis | 7 | 7.6 | 7.7 | signal |
| 5 | Quality Of Life Decreased | 9 | 7.5 | 7.6 | signal |
| 6 | Tuberculosis | 8 | 7.0 | 7.0 | signal |
| 7 | Therapeutic Product Effect Decreased | 26 | 6.6 | 6.7 | signal |
| 8 | Acne | 43 | 6.4 | 6.5 | signal |
| 9 | Product Prescribing Error | 13 | 6.2 | 6.2 | signal |
| 10 | Madarosis | 6 | 5.8 | 5.8 | signal |
| 11 | Blood Triglycerides Increased | 9 | 5.7 | 5.7 | signal |
| 12 | Lymphopenia | 7 | 5.6 | 5.6 | signal |
| 13 | Impaired Quality Of Life | 7 | 5.5 | 5.5 | signal |
| 14 | Therapeutic Response Unexpected | 18 | 4.5 | 4.5 | signal |
| 15 | Malignant Melanoma | 4 | 3.4 | 3.4 | signal |
| 16 | Hair Texture Abnormal | 4 | 3.3 | 3.3 | signal |
| 17 | Drug Effective For Unapproved Indication | 8 | 3.1 | 3.1 | signal |
| 18 | Dermatitis Atopic | 6 | 1.4 | 1.4 | no signal |