How can I combat the insomnia which prisitiq is giving me, tolerating pristiq (desvenlafaxine) quite well other than not sleeping much and headaches?

Pristiq (desvenlafaxine) insomnia. The first thing would be to make sure you switch the Pristiq (desvenlafaxine) to the morning. Then you could take trazodone 25-50 mg at bedtime. It is nonaddictive and does not cause weight gain. Make sure you practice good sleep hygiene. You can reference any one of dr. Heidi fowler's posts on this topic. Make sure your BP is not causing headaches. If anxiety is causing neckaches and headaches consider a temporary muscle relaxant or Buspar if it is coming from anxiety.