Insomnia: Causes
Insomnia can be caused by:
* Psychoactive drugs or stimulants, including certain medications, herbs, caffeine, cocaine, ephedrine, amphetamines, methylphenidate, MDMA, methamphetamine and modafinil
* Hormone shifts such as those that precede menstruation and those during menopause
* Life problems like fear, stress, anxiety, emotional or mental tension, work problems, financial stress, unsatisfactory sex life