East Coast Exmo
Date: November 14, 2017 10:25AM
I don't see why not.
Emergen-C is just vitamins and minerals. It won't do squat if you have a cold.
Coldeeze is a zinc gluconate based medicine. Ignore the "homeopathic" label if there is one: they put it there to fool the gullible into thinking that this is some sort of natural product. The active ingredient isn't diluted enough to be non-existent, so it's not the same as "homeopathic" medicines that you normally find. Zinc gluconate may or may not shorten the duration of your cold.
Dayquil is a common over-the-counter medication for cold and flu that contains a combination of medicines.
Taking them together shouldn't be a problem, but consult with your primary care physician if your are concerned.
Here are web sites that discuss these products.