Placebo (n = 290)

TI (n = 1991)

Non-placebo comparator (n = 1363)

Cough

19.7%

25.6%

5.4%

Throat pain or irritation

3.8%

4.4%

0.9%

Headache

2.8%

3.1%

1.8%

Diarrhea

1.4%

2.7%

2.2%

Productive cough

1.0%

2.2%

0.9%

Fatigue

0.7%

2.0%

0.6%

Nausea

0.3%

2.0%

1.0%