I was on benzos (klonopin) for four years for depression, ptsd, and severe anxiety. There was a miscommunication when my doctor transferred away and my new doctor had no idea I was on it for so long. He decided to wean me off the medication because of how bad withdrawals can be. They were catastrophic.
I had severe muscle spasms, seizures, hallucinations, intense headaches, and didn't sleep for days. Eventually, I had to be hospitalized because I couldn't take care of myself during the withdrawal period. Imagine a panic attack that lasted for months straight. I thought the nurses and doctors were actual demons and that I had died and gone to hell.
After several months, the withdrawl effects went away. I would easily choose death over going through that again.