Levinrec, you didn't say what heart disorder your verapamil treats, but my husband just read over my shoulder here and said it'd be wise to be very cautious about mixing weed with that medicine, particularly if you smoked or ate an Indica strain. Verapamil relaxes your blood vessels, and so if you combined weed with something that already does that and had some additional vaso-relaxation (dilation) from weed, that could slow your heart rhythm down and/or lower your blood pressure too much.

As far as anxiety goes, be aware that some of the Sativa strains can worsen anxiety in lots of people, giving them jitters and causing panic attacks in some cases. So if you're already being treated for anxiety, I'd be careful there, too.

You'll just want to be very knowledgeable about what type of weed you're buying and smoking/eating if you do try it. Good luck!