Staying on track


How long do I have to wear Optune Gio every day?

A large clinical study showed that Optune Gio should be turned on for at least 75% of the time, or 18 hours per day, to get the best response from treatment. That means you can take up to a 6-hour break from Optune Gio every day.

Craig, an Optune Gio user and Patient Ambassador

Tracking Optune Gio usage with MyLink™

Optune Gio records the amount of time that therapy is delivered per day.

How does MyLink work?

MyLink pairs with your Optune Gio device to securely transfer your usage data—all from the comfort of your own home.

How do I find out about my usage?

Your MyNovocure® team can inform you about your device usage. They can review the secure data remotely.

How do I get MyLink?

During your start appointment, your DSS should have provided a MyLink device.

Download the MyLink Guide

Planning your Optune Gio break

Because you can take up to a 6-hour break from Optune Gio every day, you can customize your treatment plan by taking breaks when it’s most convenient for you. You can even line up your array change days with your treatment breaks to make the most of your time. Some Optune Gio users plan for:

Social outings, like dinner with friends
Wearing Optune Gio overnight to use their break during the day
Activities, like playing golf or swimming*

*Consult with your HCP before engaging in physical activity

“When I take breaks from the Optune Gio, I go to my dance group. I dance once a week. It’s a little too aerobic to be carrying these extra pounds on my back, so I make sure that I have an array change day on the day that I have my dance group.”

– Lynn, Optune Gio user and Patient Ambassador

Taking a Break From Optune Gio

See how Optune Gio users take their daily break.

Learn about MyNovocure
Get support
Optune Gio Buddy Program
Schedule a chat
Applying the arrays
See the steps

Important Safety Information

What is Optune Gio® approved to treat?

Optune Gio is a wearable, portable, FDA-approved device indicated to treat a type of brain cancer called glioblastoma multiforme (GBM) in adult patients 22 years of age or older.

Newly diagnosed GBM

If you have newly diagnosed GBM, Optune Gio is used together with a chemotherapy called temozolomide (TMZ) if:

  • Your cancer is confirmed by your healthcare professional AND
  • You have had surgery to remove as much of the tumor as possible

Recurrent GBM

If your tumor has come back, Optune Gio can be used alone as an alternative to standard medical therapy if:

  • You have tried surgery and radiation and they did not work or are no longer working AND
  • You have tried chemotherapy and your GBM has been confirmed by your healthcare professional

Who should not use Optune Gio?

Optune Gio is not for everyone. Talk to your doctor if you have:

  • An implanted medical device (programmable shunt), skull defect (missing bone with no replacement), or bullet fragment. Optune Gio has not been tested in people with implanted electronic devices, which may cause the devices not to work properly, and Optune Gio has not been tested in people with skull defects or bullet fragments, which may cause Optune Gio not to work properly 
  • A known sensitivity to conductive hydrogels (the gel on the arrays placed on the scalp like the ones used on EKGs). When Optune Gio comes into contact with the skin, it may cause more redness and itching or may rarely cause a life-threatening allergic reaction

Do not use Optune Gio if you are pregnant or are planning to become pregnant. It is not known if Optune Gio is safe or effective during pregnancy.

What should I know before using Optune Gio?

Optune Gio should only be used after receiving training from qualified personnel, such as your doctor, a nurse, or other medical staff who have completed a training course given by Novocure®, the maker of Optune Gio.

  • Do not use any parts that did not come with the Optune Gio Treatment Kit sent to you by Novocure or given to you by your doctor
  • Do not get the device or transducer arrays wet
  • If you have an underlying serious skin condition on the scalp, discuss with your doctor whether this may prevent or temporarily interfere with Optune Gio treatment

What are the possible side effects of Optune Gio?

Most common side effects of Optune Gio when used together with chemotherapy (temozolomide, or TMZ) were low blood platelet count, nausea, constipation, vomiting, tiredness, scalp irritation from the device, headache, seizure, and depression. The most common side effects when using Optune Gio alone were scalp irritation (redness and itchiness) and headache. Other side effects were malaise, muscle twitching, fall and skin ulcers. Talk to your doctor if you have any of these side effects or questions.


Please click here for the Optune Gio Instructions For Use (IFU) for complete information regarding the device’s indications, contraindications, warnings, and precautions.

Novocure Websites

This website is intended for people seeking information on Optune Gio.

On this site, videos and images identified as Optune Gio users, caregivers, or healthcare professionals depict actual patients, caregivers, and healthcare professionals.

Patient images reflect the health status of the patients at the time each photo or video was taken.


All rights reserved.

MyLink, MyNovocure, Novocure, and Optune Gio are registered trademarks of Novocure GmbH.

All other trademarks, registered or unregistered, are the property of their respective owners.

US-OPG-00063 v2.0 March 2024