What you are proposing is a REALLY stupid idea. If I ran into you I’d slap your face shake your head and yell “don’t be a f@#$in idiot!” - and I would do it because I care about you.
Continual use of any over the counter product is going to cause terrible health problems. Aspirin for example will most likely give you stomach ulcers.
You CANNOT ignore this.
Other painkillers are known to cause liver failure - and death - when abused the way you are describing.
And here is another point - so aspirin makes you feel stronger. SO WHAT? The aim isn’t to feel stronger, the aim of training is to feel weaker, fatigue the muscle fibres, so that they supercompensate and grow actually stronger.
That is ACTUALLY stronger, instead of just “feel stronger”.
If you use something to give a kick to your workout you are kidding yourself. You want your workouts to be tiring, then you want to back off and grow. The best thing you can do is increase recovery, and that is done with FOOD and SLEEP and DAYS NOT TRAINING - it is not done with over the counter drugs.
Although a lot of people speed up recovery with steroids of course. But you really should not need them because if you are starting out, your natural ability to recover will be more than adequate - as long as you eat a lot and sleep.
Hope I have just saved someone dying of liver failure.