My question to you is, why would you need to worm a cat regularly?
Does it live outside? Has it had worms before?

Some worm medications can be quite toxic. After all, the medication
has to kill the worms but not the cat. Many medications are specific
to the kind of worm the cat has, so giving a different medications
will not kill another worm.

Best advice is to contact a veterinarian to get a dose of the proper
medication. Most likely, you'll be asked to bring in a stool sample to
check for parasites.