"i have been a long-haul flight attendant for over 35 years and have used this drug since it&#039;s release. i find it extremely effective, with no side effects for me whatsoever. i will say that, like a lot of sleep aids and sleeping tablets, its&#039; continued use does cause a psychological dependancy and the effectiveness of the drug becomes less and less. therefore i would recommend not using the drug every night and alternating it with other sleep therapies."