Having read back and seen what Pat is on about.
Using everyday meanings of words in particular subject areas always casuse problems.
Dictionaries merely report how words are used, not what they actually mean within a defined subject area.
In common speech one might say that paracetamol assuaged pain- and in fact it does stop pain signals being received, but to then go on to say that anything that 'assuages pain' makes that action or substance a 'sedative' is a logical error.
Using the example above- stopping punching you in the face would allow you to calm down and relax and feel less agitated, but does that make 'stopping punching someone in the face' a sedative. NO.
Sedatives are clearly defined in pharmacology and medicine as actions or substances that reduce reactions to external or internal stimuli.
Some analgesics (pain relievers) ate sedatives as they do that directly.
Paracetamol does not and is not classed formally as a sedative.
It is the difference between informal and formal usage- educated and uneducated as I noted above.
In a clinical environment if a senior doctor said "this person needs sedation, what shall we give him" and the junior doctor suggested paracetamol, she would be rightfully derided because Paracetamol is an anti-pyretic and analgesic, but not a sedative.