I really like the GAIA brand. They call theirs "liquid phyto-caps" and they ask you to drink with warm to hot water. They're a bit expensive but when you're sick you need to quickly attack an infection. I've liked using their Oil of Oregano. It just seems the Italians have it right: a little oregano, olive oil, vinegar, garlic, onions and wine in their diet (probably every day) are very good for them.
Cindy