Had to take an anti anxiety medication when recovering from multiple concussions (an SSRI). Side effects were:

I couldn’t pee. I’d have to sit on the toilet for 20 minutes..drip. Drip. Drip..

The other effect was I’d leak semen into my underwear all day. Go outside for a couple hours and I’d be “glued” to my underwear with a dried stain the diameter of a coffee mug.