[Cutaneous side-effects in drug assessment]

Drug-induced cutaneous side-effects are very frequent. All dermatitis may be induced by drugs. It is difficult to identify the drug responsible because patients take many drugs (prescriptions, self medication). For each pathology, physicians may use assessment methods based on specific chronological criteria (challenge, dechallenge, rechallenge) and specific semeiological criteria (promoting factors, alternate non-drug related explications, specific laboratory tests) to identify the drug responsible.