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occurs in individuals due to a number of causes like physical illness, stress
, some mental illnesses, due to effect of some psychoactive drug or it may occur due to behavioral modification. You have been using mirtzapine but its not effective. Recently you have been started on Stilnox
long acting 12.5 mgs. As you have mentioned you slept for one day but next day you were not able to sleep and you took two medicines.
I would like to tell you that zolpidem is a drug that help to induce sleep, it is given for early insomnia. But in stilnox its long acting formulation is there and it help in sleeping as well as it also help to maintain sleep. Dose of 12.5 is sufficient and if you will take double the dose it will not help and it will increase the restlessness
The reason of insomnia in you may be poor sleep hygiene
Try to fix your time to go for sleep. Use bed only for sleeping, don't watch TV or read books from bed. Don't take tea/coffee or alcohol inn evening. Have light meals in night. Don't think again and again about not getting enough sleep as it will further increase stress and consequent insomnia. Do light exercises in evening.
If you don't get relief from these symptoms visit your Psychiatrist
Dr. Seikhoo Bishnoi