If your friend has High BP - DO NOT TAKE SUDAFED!!! - It really spikes BP and is dangerous for anyone with High BP even if they are on medication!!
I would check the ingredients carefully of any homeopathic med - since a lot of themn contain things like "willowbark" - which will also spike BP, and cohosh (sp?) - another BP spiker.
Ok now that I've warned you, here's what I did. Last XMAS at WDW, I got very sick - MAJOR flu, the whole bit and I couldn't get my head clear enough toeven hold it up. Plus I was sneezing and coughing. You know, the whole shebang. I knew that if I could clear my head and sinuses I would be fine.
I was told by the docs it would be at least 10 days before I would feel better - I had been in bed 2 and was miserable. This is what I did, it works, it worked for my dad who has high BP and my brother as well. If there is an Outback steakhouse near you, get some of their horseradish - they do something to it that makes it really hot but palatable. Get a couple of juicy pink grapefruits. Cut the grapefruits in half or in quarters and wipe the horseradish over the tops of the grapefruit - like butter on bread. Eat the grapefruit completely. Eat half a grapefruit every 2 hours - you'll be up the next day and feel great!