Sutara.
I understand the reports.
However, my point is that treating these with common sense and some precaution is more likely to produce beneficial results and less likely to cause possible harm
I never, personally, get flu, but I do get colds every winter. After the initial cold has gone, I treat the remaining symproms with high dose of Vitamin C each night for about 5 days, Take a break for a week then another daily high dose for 5 days. Clears it up better than any cough medicine.
I suggest it it a mistake to put yourself onto routine doses of any medicine. Far better to look at your diet, lifestyle and the amount of fresh air you get.