There have been extremely rare case reports of severe acute anaphylactic-type reactions but their relationship to Ambroxol is uncertain. Some of these patients have also shown allergic reactions to other substances.
Immune system disorders: Frequency not known: Anaphylactic reactions including anaphylactic shock.
Skin and subcutaneous skin disorders: Frequency not known: Severe skin reactions [including Stevens Johnson Syndrome, Toxic Epidermal Necrolysis (TEN), Erythema Multiforme (EM) and Acute Generalized Exanthematous Pustulosis (AGEP)].
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