Found this medicine I hope you like it 

I like the sound of those ingredients

Yum, Yum.
Woh, the Flu. Two years ago I had the (Swine ? -
very hush, hush for some reason

) Flu and developed Asthma, and was constantly on Antibiotics. I had that Tamiflu stuff initially. Man, it was bad for two weeks, and threw some other Respiratory problems which were minor into a chronic state.
I'm sure people moving around on Airplanes all over the World with strains of Flu has a lot to do with these Super Flu's.
When Captain Cook travelled the seas discovering 'New Lands', Flu's from the crew, plus Syphilis, and other diseases almost wiped out whole races, in Australia, New Zealand, Fiji. They also became Alcoholics, the Natives having no resistance. "The Fatal Impact" (
Book) of European exploration.
Eventually after 14 months on Antibiotics, I had a Sinus opertation, september 2012, which has sorted me out.
If you are prone to weak immune system, or have an existing problem, Flu's can exasperate other probs; such as my Sinuses were totally infected, and blocked by Polyps, which had to be removed.
I have a 200ml bottle given post OP that I still use to rinse Sinuses with sterile (boiled) water, plus salts.
Called a
Nasal Toilet, hehe.
Boil water, let it cool. Add sachet of salts, and cool water to plastic bottle with a screw on plastic nozzle.
Put nozzle up nostril while leaning over sink, squeeze bottle and water goes up and comes out the other Nostril. Looks bizarre but is great to wash all pollens and crap out of head.
Good when you've Flu to get all that infected crap outa your head too. May sting a bit, so a swig of that 'One Night Cough Syrup' could be handy.
Asthma now has gone, as the Sinuses were infecting my chest.
The place I live has some of the worst allergies in the world, which apparently is why from time to time I get run down, and miserable. A backlash from invading a foreign country, and killing off most of the population ?
We aren't acclimated, climatised, to the pollens in Australia as yet, well a lot of people aren't.
I do have the Flu shot each year, but luckily don't get symptons.