Like all medicines, Sinupret/Sinupret Forte dragées can cause side effects, although not everybody gets them. Gastrointestinal disorders (e.g. stomachache, nausea) are uncommon. Hypersensitivity reactions of the skin (e.g. exanthema, erythema, pruritus) are rare. Furthermore, allergic reactions such as angioedema, dyspnoea, face oedema have been reported. In these cases, stop intake of Sinupret/Sinupret Forte dragées and consult a physician.