I think you gotta it wrong. Horus never drugged Seth lol
He says as a kid he did burn incense and give him alcohol to keep him disoriented so that he'd keep mistaking him for Anubis and cuddling him... But he was just a poor powerless kid starved for affection AND, given the way they were surrounded by the dead bodies of the boys that Seth had not mistaken for Anubis, I can't say I blame Horus for not wanting to see what Seth would do once he sobered up and realized he wasn't his son!
Ah so the OP meant that lol c’mon what was supposed poor Horus to do?!
The admiration became unhealthy. He started drugging Seth and enabling him and since Anubis never heard those words for himself, of course they wouldn’t make an impact now. Team Seth (he’s so frikken beautiful) and fxxk everyone else. Cover the world in sand my guy.