- not frequent; not occurring regularly or at short intervals; "infrequent outbursts of temper"
- (infrequently) not many times; "in your 1850 church you not infrequently find a dramatic contrast between the sumptuous appointments of the building itself and the inhuman barrack-like living conditions in the church room"
- dry mouth, insomnia, drowsiness, blurred vision, rash, pruritus