Hello, Itching after stopping Montelukast can indicate a few things: Underlying Allergy: The itching might be due to the underlying allergy that Montelukast was controlling. If you stop the medication, the allergy symptoms, including itching, might return. Rebound Effect: In some cases, suddenly stopping Montelukast can cause a rebound effect, where the body overreacts and produces more histamine, leading to increased itching.