The first thought that you may have when you hear the word &ldquo;rubber&rdquo; is natural rubber &ndash; a poly-isoprene-based polymer, which has as its origination the latex fluid drawn from rubber trees (most prominently in Indonesia and Malaysia). Although natural rubber has been used in the past for pharmaceutical applications, potential issues with latex allergies resultant from proteins from the original latex, have led to the almost complete adoption of synthetic rubber.<br />