And it happens to be included in several composite pain killers as well.  (Excedrin, Vicodin, ... etc.)<p><a href="http:&#x2F;&#x2F;www.knowyourdose.org&#x2F;common-medicines&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.knowyourdose.org&#x2F;common-medicines&#x2F;</a>