Can I get a health certificate for a cold?

If you don't have a fever, just take cold medicine and anti-inflammatory drugs. If you are in a hurry to take medicine after 2 or 4 hours, you can take it. Generally speaking, cold medicine is basically metabolized in 4 hours, and the medicine is only metabolized through liver and kidney. If your liver and kidney are fine and there are no infectious diseases, you can definitely get a health certificate!