Sales of anti-anxiety drugs, anti-depressants and sleep aids have surged since last month's terrorist attacks, particularly in New York and Washington. Therapists are reporting agitation, sleeplessness, survivor guilt and depression - and not just among those directly affected by the attacks on the World Trade Center and the Pentagon. New prescriptions for sleep aids rose 27.5 per cent in New York City between the week before the attacks and the last week of September, according to NDCHealth, which gleaned the figures from retail sales. New prescriptions for anti-anxiety drugs rose 25 per cent, and new prescriptions for anti-depressants jumped 17 per cent.