Not sure if this is what you are referring to but, would suggest NAC either way - of course, do your own research. Here's a link from the NIH of all places:

https://pubmed.ncbi.nlm.nih.gov/32504923/

Here's one from WebMD:

https://www.webmd.com/diet/health-benefits-nac#1

I used normie friendly links because people seem to give them more credibility for some reason.

Good ole remedy from our grandmothers: a few drops of eucalyptus oil in a bowl of boiled hot water. Put a towel over your head (and the bowl) and inhale until the steam stops hitting your face. Bonus is your skin gets a nice glow too.

Food grade h2o in a nebulizer

UNRELATED TO SUPPLEMENTS - PLEASE READ THIS:

Having gone through this with two family members who got REALLY SICK after being around freshly vaxxed persons, the unrelenting and continuous 'cough' was a real problem.

Here's what I learned.

1. If the cough is productive, i.e., mucus is coming up - you must continue to force the cough, coughing often and continuously, to bring up loose sputum and clear it from the chest. This may require long coughing sessions. Very important. Do not leave any mucus that is forming to remain in the lungs.

2. If the cough is dry, i.e., nothing is coming out - then you have inflamed lungs that must be dealt with and the cough is a symptom. The inflamed lungs may be happening as a result of microthrombosis which is very tiny clots happening in the vascular system which is the hallmark of Covid virus or Covid Vax exposure. Have your doctor write a script for a D-Dimer blood test. Get it ASAP. If your numbers are elevated, you have a clot problem and need to be on an anti-coagulent drug like Eliquis TODAY, and might possibly want to add a steroid to calm the lungs down.

3. Do you have a finger pulse oximeter? If not, get one today at your local pharmacy or order it online for quick delivery. You really need to know if you oxygen is running low. If it is below 94 your lungs are struggling. If it is close to or below 90, you need to have an oxygen tank delivered to your home with a 50ft tether. You need to get on the oxygen and help your lungs with this task until your oxygen levels without supplemental oxygen are at 95 or above.

4. If you have a cough and inflamed lungs, you should obtain a device called a flutter valve or other breathing apparatus to force the lungs to expand and collapse. Do these exercises 10 times per day or until the coughing really stops. Inflamed lungs can create the alveoli to flatten and heal in a flat and non-inflated shape. This will permanently reduce your lung capacity.

Don't let this happen. Inhale big, big, big, then exhale very slowly and fully. Inflate. Collapse. Inflate. Collapse.

Good luck!

Honey

NAC is good. For me Serrapeptase has been life changing. I didn't get a cough from covid but have struggled with a morning cough and asthma for quite sometime. This stuff eats inflammation, my cough went away after one dose.

One of the best ways to clean your system get's no attention, and when I tell people, they don't do it even when they agree they should. Drink more water. That's it. Take your body weight in lbs, covert to ounces, divide that in half and drink that many ounces of water a day. This will be about a half gallon for most. I drink about a gallon a day.

Below is from this website: https://www.diyhealthremedy.com/5-ways-how-onion-and-sugar-remedy-fights-cough/

Fighting a cough is not easy. You may consider buying an over-the-counter cough syrup, but in most cases apart from making you drowsy the cough syrups cannot do much in stopping the persistent coughing. However, you can easily treat cough naturally with the help of homemade onion and sugar mixture. The remedy helps in loosening the phlegm so that it can be easily expelled from the lungs. By clearing the lungs, the onion and sugar syrup helps in providing fast relief from cough.

For this home remedy you will need one to two medium sized onions and half a cup of sugar. Slice the onions into equal pieces. Place a layer of onion slices on the bottom of a glass jar. Spread a layer of sugar on the onion slices. Cover the sugar layer with onion slices and cover it with sugar. In this manner, continue arranging the onion and sugar layers one over another until the jar is full. Cover the jar and keep it aside at least for 12 hours. The ingredients in the jar will gradually turn into liquid. Take a teaspoon of the syrup every two to three hours to reduce coughing.

Homemade HCL, grape fruit rinds and orange rinds a good bunch and boil for 6 hours.

Thanks…

Clear Lungs is a natural remedy that you can find at Sprouts, Natural Grocer, etc. Works to clean out the nasty lung butter from colds and flu.

That and get a netti pot and clean your sinuses.

Hydrogen peroxide in a nebulizer for 10 to 15 mins. Repeat daily as needed.

https://madisonarealymesupportgroup.files.wordpress.com/2021/04/rapidvirusrecovery.pdf

I had a kingering cough for weeks. time and lots of fluids.

Take a baby aspirin each day until it’s gone