Intensive care unit patients who receive higher doses over longer periods, typically via IV drip, are more likely to experience such side effects. Additionally, the prolonged use of tranquilizers increases the risk of obsessive and compulsive disorder, where the person becomes unaware whether he has performed a scheduled activity or not, he may also repetitively perform tasks and still re-performs the same task trying to make-up for coutinous doubts. Remembering names that were earlier known becomes an issue such that the memory loss becomes apparent.