adjective
harmful, unfavourable
the treatment had an adverse effect on his dermatitis = it made it worse
adverse reaction from a drug = situation where a patient suffers harmful effects from the application of a drug
adjective
harmful, unfavourable
the treatment had an adverse effect on his dermatitis = it made it worse
adverse reaction from a drug = situation where a patient suffers harmful effects from the application of a drug
English dictionary of medicine. Английский словарь медицины. 2012