I received a notice in the mail regarding this hypertensive medication that I have been taking
for quite some time. Apparently some batches contained N-Nitrosodimethlamine (NDEA) which
is a "probable carcinogen". The letter contained no information on how long this had been going on or how high a content the tablets contained, but my medicine was included in the batch list that was sent. Of course, I received a replacement tablets from the pharmacy where I get them.