There is no known issue with sarcoid and botulinum toxin. Therefore, your potential for side effects is the same as anyone else who receives botulinum toxin. I would certainly have a board certified physician provide your treatment. While botulinum toxin is fine, I would hesitate to receive fillers in the future. They have a known risk (while small) of causing inflammatory reactions that mimic sarcoid.
Thanks for your question. There are no contraindications to receiving botox injections into the forehead in individuals with sarcoidosis. Botox works extremely well in the forehead when placed appropriately and I am sure you will be happy with the result. Best Regards, Jacque P. LeBeau, MD