Approximateley 1 year ago, I went to the emergency room and was treated with lisinopril for hbp. The following day I woke up with a terrefic migraine and cramping in both legs. I learned via internet that it contains the venom of a Brazilian Piper snake. Now, one year later, I am still having the cramps. Patients should be told what is in the products that we are being given. I only had two pills but it has changed my life. I am still suffering with leg cramps. They are poisoning all of us.