Add Quantum Herbal Products Cold & Flu Formula to your list. I have not been able to find a complete ingredient list for this product online. The list is truncated in the same spot in every listing. However, I’ve heard this stuff is great (and strong). I have never tried it, because it has cayenne in it and I am allergic to peppers, but it came very highly recommended to me by someone I trust to evaluate this sort of thing (thanks, Gwendolyn!). Just take note – there are many companies that sell this type of product that are named “Quantum.” And, there’s a product called “Quantum Cold & Flu” that also comes in a dropper bottle, but it is not the same. Make sure it says Quantum Herbal Products on it.