Nifedipine
"I've been taking this medication for quite a while for Raynaud's. I was concerned about my naturally-low blood pressure but Doctor said it wouldn't be affected. Seems that is the case. As far as Raynaud's, there are a few medicines I take that I describe as "I'm sure it helps, I'm not sure how much, don't want to find out what it's like without it". Also, my Raynaud's is accompanied by Mixed Connective Tissue Disease to complicate matters."