I didn’t read it all, but a couple thoughts: Betadine is a brand name for a povidone iodine product—they’re not different things. Robitussin DM has both an expectorant (seems good) and a cough suppressant. A cough suppressant might not be what you want if you want the gunk to get out of your lungs. If there’s a “productive” cough I’d think it’s better to just cough.
I didn’t read it all, but a couple thoughts:
Betadine is a brand name for a povidone iodine product—they’re not different things.
Robitussin DM has both an expectorant (seems good) and a cough suppressant. A cough suppressant might not be what you want if you want the gunk to get out of your lungs. If there’s a “productive” cough I’d think it’s better to just cough.