“The Shot.”
There is only one birth control injection approved in the US that works by releasing progestin deep into muscle tissue:
Pfizer’s three-month dose of progestin is injected deep into buttocks or arm muscles. The long-term presence of progestin in the interior muscle system, though, has proven more dangerous than its labels let on, sometimes triggering slow-growing brain tumors called meningiomas.
Sidenote: Researchers believe progestin is less likely to cause meningioma development when taken orally.
Meningiomas are usually not cancerous, but they can disrupt neural signals when they grow large enough to press against fragile brain tissue. How big? They can cover more than half the size of your forehead.
The British Medical Journal (MBJ) in March 2024 published unprecedented findings linking meningiomas to progestin deposited deep in the body, gaining greater risk over time, like that injected with Depo-Provera.
Meningiomas can grow for a long time, often unnoticed, until they’re large enough to press on brain tissue. Almost overnight, affected women begin exhibiting noticeable problems with vision, balance, speech, and memory. Meningiomas must be surgically removed.