'Mad Money' Lightning Round: I'm Sticking With Isis Pharmaceuticals

Search Jim Cramer's "Mad Money" trading recommendations using our exclusive "Mad Money" Stock Screener. NEW YORK (TheStreet) -- Here's what Jim Cramer had to say about some of the stocks callers offered up during the Mad Money Lightning RoundaTuesday evening: GNC Holdings : "I think GNC needs to merge with Vitamin Shoppe . Otherwise, there's too much competition." Goldman Sachs : "This stock got hit after they reported but has been crawling back ever since. I think that's going to be the new pat...