[aspagnito (OP)]

Hello.
First of all, I don't want to sow defeatism. I'm not saying I have a drug for COVID-19. I just want to describe the case of my father, who most likely cured himself of COVID-19.
About 2 months ago, my father had a fever and was coughing very strongly. He's an old man and didn't want to go to the doctor. He was coughing so much that he almost spit out his lungs, so I gave him the Polish drug "Neoazarina" with codeine phosphate and powdered thyme herb. After a few days, my father was healthy.
The hypothesis is: If drugs based on pseudoephedrine help to cure the flu easily, then drugs with codeine (a "cough medicine" - that is to say, drugs acting in the lungs and lungs are infected the most in COVID-19) help to cure COVID-19.

[alancalverd]

A good catch, but some confusion between cure and suppression of symptoms.

The only known cure for most viral diseases is for the patient to develop specific antibodies that neutralise the virus, in sufficient quantities to overwhelm it. It is therefore correct to say that this patient cured himself of whatever disease he had.

The problem with COVID is that it triggers an excessive inflammatory response that depletes lung function. Treatment is therefore principally aimed at reducing inflammation (codeine) and stimulating lung function (ephedrine) to keep the  patient alive until his immune system stabilises and neutralises the virus.

[Bored chemist]

What cured your father was his immune system.
Ironically, what often kills covid patients is an overreaction by the immune system.
That's why cortisone is (in some circumstances) effective.

It's possible that , at some level, the codeine and pseudoephedrine stopped an overreaction.
But realistically, even among the elderly, most people recover.
So it's not as if your father's recovery is some miracle that needs an explanation from drugs.
It's more likely to be luck.

[aspagnito (OP)]

Thank you for what you've said. It's very significant. Of course I'm not making jokes - the COVID-19 theme is too serious for that. However, my point is that there used to be preparations based on pseudoephedrine available in Polish pharmacies. They were over-the-counter and banned (mostly) because students combined them with energy drinks and codeine. The effect was supposedly like after amphetamine, while the pseudoephedrine itself made the flu patient recover faster. At least that's how it felt subjectively.
My question is - if codeine and ephedrine (according to your suggestions) are stimulants that suppress the symptoms of the disease, is it right to think that they cause something like a "hype mode", that the patient is less affected by the symptoms of the disease and builds up immunity to a disease such as influenza and possibly COVID-19 faster by itself?
I'm asking for a factual answer - my father hasn't been to the doctor, so I'll never know if he was sick with COVID-19 or not. However, after taking this medicine, he recovered very quickly. So is my assumption correct?