If you had a stent placed 12 years ago and now have erectile dysfunction, you should not use Himcolin Gel without talking to your doctor. Although Himcolin is a herbal gel used externally and usually doesn’t affect the heart, it’s still important to be careful due to your heart history. Erectile dysfunction can sometimes be linked to heart or blood flow issues, so it’s best to consult your doctor first to find the proper and safe treatment for you.