SSRIs and SNRIs can cause akathisia. It happened to me, and it was by far the worst thing that happened to me ever in my life. I went through 6 months of nonstop hell with akathisia, and it was the worst 6 months of my life. Trust me, if you have severe akathisia, it is worse than death.
This is somebody who has akathisia from taking Effexor (an SNRI): https://youtu.be/W_iiy8ISvdY
This is a public service announcement from an akathisia advocacy group (known as Akathisia Alliance) about akathisia: https://youtu.be/VgvhAilA070
Here is an article from a mother whose son developed akathisia from taking an SSRI for about a week. (My story has a lot of common denominators to this one): https://www.madinamerica.com/2021/06/boy-interrupted-a-story...