Sertraline - How bad is insomnia on Zoloft ?

Hi, I have been taking Sertraline for a few years now 175mg. I take it for PTSD as well. It does take about a month to "stabilize" on it, and anytime I go up or down in dosage. I have found what works for me; I take it about 1-2 hours before bedtime, such as 9pm every night, I fall asleep about 11pm. I do feel "awake for the 1-2 hours after I take it then I get sleepy. I have found that I usually sleep thru the night and soundly at that.

Hi, Andrew!
This is off the point of your question but I'm wondering if you've ever considered therapy for your PTSD? I'm half way through a therapy call CPT (Cognitive Processing Therapy) which differs from CBT (Cognitive Behavioral Therapy) in that you don't need to "relive" or even talk about your trauma. Instead it deals with your emotional reaction to the event(s) and how to reprocess these feelings more appropriately.
It's already done wonders for me (In addition to my medication) and I'm only going on session 6 of a 12 session course.
It would require a referral to a qualified therapist but it's just a thought you might consider discussing with your doctor.
masso answered your question very nicely and I hope it will help you to feel better quickly.

Insomnia is considered a very common side effect which affects up to 21% of people taking this antidepressant, on the other hand, also a very common side effect is somnolence , it affects up to 13% of users.
Give it the antidepressant some time, most likely side effects lessen within the first 10 days of taking the medication, if the insomnia persists, there are plenty of sleep aids your Dr. can prescribe.