Alpharma Says Pfizer Drug Generic Cleared  NEW YORK (Reuters) - A federal appeals court has cleared  the way for Alpharma Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=ALO.N target=/stocks/quickinfo/fullquote"&gt;ALO.N&lt;/A&gt; to launch a generic form of  Pfizer Inc's &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=PFE.N target=/stocks/quickinfo/fullquote"&gt;PFE.N&lt;/A&gt; Neurontin capsules to treat epilepsy,  sending Alpharma shares sharply higher.