Nifedipine
"I've been on Procardia XL 60mg once daily for a few weeks and hate the side effects. It started out with simple tingling in hands, hyper active bowel sounds and some constiparion. Now I'm experiencing fast heartbeat. Although it helps to stabilize my BP, it's definitely not worth the ride effect especially the palpitations, which gets scary at times.  I plan on stopping this med and switching to something else asap!"