From the gastrointestinal tract: abdominal pain, indigestion, incl. nausea, vomiting, exacerbation of gastric ulcer and duodenal ulcer.
Allergic reactions: hypersensitivity reactions (skin rash, itching, angioedema, rhinitis), urticaria, fever, anaphylactic reactions, including anaphylactic shock.
From the skin and subcutaneous tissues: Stevens-Johnson syndrome, Lyell's syndrome, acute generalized exanthematous pustulosis.
Other: dizziness, headache, increased activity of "hepatic" transaminases in the blood serum.