How long does it take for the side effects of Silenor to wear off?

It appears that the symptoms you are experiencing are likely due to the abrupt weaning off of Imovan, as this is a medication that should be tapered off over a period of several weeks, especially when taken for an extended period of time. I recommend that you do not cut the Silenor 3mg tablet in half, but rather tolerate the effects you are currently experiencing if possible. Additionally, make sure to set aside 8 hours after taking the medication and do not eat for at least 3 hours before taking it.