500mg from a capsule and 500 from cough syrup 4 times a day is still fine. With a 100% safety margin still.

If you’re taking more meds than that without clinical supervision Id say something is wrong in the system or your medicine practices.

Where I’m from it’s common to walk to the nearest pharmacy and get meds when needed. Even over the counter stuff like paracetamols. And talking to the pharmacist. They’ll ask what you’re already taking and tell you what else to get.