Erectile Dysfunction can be a symptom of something else so it is important to see your doctor prior to taking any remedy. Here are some alternatives
An amino acid that the body uses to relax muscles and increase bloodflow. It is found naturally in some foods, such as meat and dairy. You can also take it in supplements. It can have side effects such as digestion and potassium levels so check with your doctor first.
Seems to relax the muscle and enhance blood flow.
Low levels of zinc have been shown to be a factor.