Bromhexine should be given cautiously to patients with gastric ulceration. An increase in volume of liquefied sputum should be expected.
In very few cases, severe skin disorders such as Stevens-Johnson’s syndrome and toxic epidermal necrolysis (TEN) have been reported after administration of mucolytic substances (e.g. bromhexine/ambroxol), which in most cases could be explained by the patient’s underlying disease and/or the concomitant medication. In addition during the early phase of a Steven-Johnson Syndrome or TEN a patient may first experience non-specific influenza-like prodromes (e.g. fever, aching body, rhinitis, cough and sore throat). It is possible that a symptomatic treatment is started with a cough and cold preparation due to these misleading nonspecific influenza-like prodromes. Therefore if new skin or mucosal lesions occur, medical advice should be sought immediately and treatment with bromhexine/ambroxol discontinued as a precaution.