I don't think it matters it's still red wine/alcoholic I guess just go with whatever you perfer, I don't think taste would make a difference it is really only a different taste doesn't make any bottle different to the other unless of course the percentage is more or less depending on I'd say it's brand and price :)
I don't think it'd matter what type of red, however the standard "glass" of red wine is only 5 oz, not 6.
Well, maybe you should call and ask your doctor's nurse to suggest a nice bottle.