For Patients

The IIH Weight trial aims to find out whether weight loss surgery may help treat patients with Idiopathic Intracranial Hypertension, or IIH IIH-WT-logo-without-outlinea

If you have come to this page for further information about joining the trial then please read the points below.

Could I be eligible?

The IIH Weight trial has strict eligibility criteria. If you don't fit them then you can't be considered for the trial!

  • You must have a BMI of 35 or more.
  • You must not be pregnant.
  • You must have active papilloedema - you should check with your doctor if you had active papilloedema at your last appointment.
  • The trial is recruiting in Birmingham, Exeter, and Manchester. If you live more than an hour away from one of these hospitals we might not be able to consider you.
  • If you are unsure about any of these eligibility criteria, then please email This is a confidential email address that only the trial doctors and nurses can read.

If you think you are eligible

If you think you might be eligible, then please read the Information Sheets below. They tell you what the trial involves:

IIH:WT Participant Information Sheet (Birmingham)

IIH:WT Participant Information Sheet (other sites)

If you still want to take part

If you are still interested please contact us on, and we will put you in touch with one of the local teams.