Gastrointestinal disorders Frequency unknown: vomiting, abdominal pain, oral mucosal irritation including stomatitis and/ or mouth ulceration Skin and subcutaneous tissue disorders Frequency unknown: hypersensitivity skin reactions including rash, pruritus, urticaria, angioedema, Stevens-Johnson syndrome. Cases of severe hypersensitivity syndromes including drug rash with eosinophilia and systemic symptoms (DRESS) (see section 4.4).