The unflavored stuff does taste worse than anything I've ever tasted. There's no need to leave it under your tongue, it's meant to be ingested. That would be suicide, the stuff tastes like chewing a mouthful of aspirin & washing it down with rubbing alcohol. You could get the flavored stuff, I haven't tried it yet.
The best way to take unflavored nolva/clomid is squirt it into 4-6oz of OJ & slam it, you'll barely notice the taste. I have tried every other juice, lemonade, Mt Dew, etc. None of those cover the the taste really at all. OJ works like a charm.