You are both talking about very mild over-the-counter pain relievers. Paracetamol is merely acetaminophen (USA trade name = Tylenol). Ketanol is very similar to ibuprofen (USA trade name = Advil).
These are medications for routine headaches, muscle pain, and menstrual cramps. If you are feeling a little tight, or stiff, or sore; then, sure.
Keep in mind that Ketanol is a NSAID (Non steroidal anti-inflammatory drug). Studies show that NSAIDs impair bone regeneration. The other side of the coin is that NSAIDs reduce inflammation better than acetaminophen.
Notwithstanding the above, many MDs prescribe strong pain-killers during recovery so that we can get up and exercise through the pain because exercise is more beneficial to recovery than pain-killers are potentially harmful.
I personally watched an orthopedist prescribe opioids to a total knee replacement patient explaining that it was more important to get the knee moving than it was to worry about addiction. He even said, "if you get addicted, we will get you un-addicted later after your knee is moving." Obviously, that was an extreme case but it effectively demonstrates the decision process.
So, as I understand the thinking, if pain meds are prescribed so that you can move, take the meds and move.