Calming meds for my schnauzer

I have an 11 month old miniature schnauzer.

He's been reactive to dogs and people since 16 weeks old. He's never been attacked or had a negative experience with a dog or human.

We've spent lots of training and are still trying our best with 2 trainers. However, I feel very little progress has been made and we are trying hard.

When is it time to maybe discuss calming medication with our vet? He's not been neutered because I do think it'll make his nervousne and reactivity worse (willing to try chemical castration). He's never humped anything or his fur sister. Although he loves weeing a lot outside & on top of our other dogs wee and poo.

I'm asking because maybe a short course of medication whilst we're going through intensive training may help him align his thoughts and be able to process what's actually happening.

Thanks!