Stressed Kitty! Zyklene tablets?

Hi all! Wanted to check with the cat community on Zyklene tablets. We've recently introduced a puppy into our home, and it's apparent that my cat is stressed out (she's urinating everywhere). Medical problems have been ruled out by the vet. I've been trying different things to remedy the situation. Thinking of buying Zyklene tablets to help my kitty out? What do y'all think?

I've never heard of it but did some research and it seems to help some cats and dogs, but i would consult a vet before giving it.  Some people said on amazon that their cat became a zombie on a certain dose.