 Delayed type 4 allergic hypersensitivity reactions including maculopapular exanthema, erythematous rash, urticarial eruption, erythema multiforme, photodermatitis, eczema and Stevens–Johnson syndrome can occasionally occur as a result of tetrazepam exposure.These hypersensitivity reactions to tetrazepam share no cross-reactivity with other benzodiazepines.Tetrazepam is used therapeutically as a muscle relaxant.