<p><span><span><span><span><span><span><span><span><strong><span><span><span>Drug: </span></span></span></strong></span></span><span><span><span><span><span><span>Natural or synthetic substance which (when taken into a living body) affects its functioning or structure, and is used in the diagnosis, mitigation, treatment, or prevention of a disease or relief of discomfort (www.businessdictionary.com).</span></span></span></span></span></span></span></span></span></span></span></span></p>
