I have idiopathic intracranial hypertension, taking diamox (acetazolamide). how can i help relieve the pressure naturally? herbs, foods, drinks, meds?

Very difficult: Note that your Diamox (acetazolamide) is a classical approach, but another perhaps even more efficacious approach is use of oral glycerol. This does cause G.I. Irritation, and may well not be tolerated well, but might be worth a trial. Need to discuss with your doctor, as dosing is a bit complex. There is otherwise, no food, supplement, vitamin which is of any benefit.

Weight loss: I am not sure if herbals exist out there to fight pseudotumor. However, given the high association with obesity, weight loss is thought to help significantly. Also, all patients with the diagnosis of "pseudotumor" should get an MRI to look at the veins draining the brain to make sure a blockage isn't causing the symptoms.