Hello!

Our global open letter demanding that governments take action to let cluster headache patients treat their pain legally with psychedelics has been signed 663 times as of this writing.

We have gathered signatures from people in 45 different countries, including 175 patients and 80 cluster headache researchers and advocates. Signatories include:

Thank you for signing and sharing with others! Please keep sharing and spreading the word.

Volunteering opportunities

We’re looking for volunteers to help us with a wide range of tasks. Most importantly, we need help gathering signatures. Since anyone can sign our letters, any help reaching more people is very welcome. We hope to reach at least 2,000 signatures by the end of the year.

​Get in touch if you would like to help, or get started on your own by posting in relevant forums, social media groups, or reaching out to researchers in the field.

We’re very grateful to Romperacimos, a cluster headache information website in Spanish, for helping us gather over 150 signatures from Spain in just a few days!

End of year fundraiser

We launched our 2025 end of year fundraiser! If you’d like to support our mission and help us grow our team, please consider donating to our fundraiser. We’re aiming to raise at least $50,000 by the end of the year.

As always, consider also donating to Clusterbusters, who have done pioneering work on cluster headaches for over 25 years.

Thank you and all the best!

The ClusterFree team