Seborrheic dermatitis: a newly reported side effect of neuroleptics

Of 42 chronic patients with neuroleptic-induced parkinsonism, 25 were found to have seborrheic dermatitis; this side effect was seen in only 1 of 17 acute patients with neuroleptic-induced parkinsonism. Parkinsonian symptoms may precede the onset of seborrheic dermatitis in patients receiving chronic neuroleptic treatment.