Docosanol
"The tube is a pump Fake. Used it for one day , and next day its gone. It seems like its more than how much is actually in there. Use sparingly. I'd just recommend the push tube , because then you can monitor how much you're actually using. This stuff works well I swear by it. Go get it. The doctors tried to give me a 200 dollar medication -- hahaha not this time. I'd rather pay 40 dollars for two of these."