Cramer's 'Mad Money Lightning Round': Schering Plows Ahead

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Here's what Jim Cramer had to say about some of the stocks that callers offered up during the "Mad Money Lightning Round" Wednesday evening:

R.H. Donnelley (RHD Quote): "It's been too high. ... There's been too much hype in the name. ... I want to sell R.H. Donnelley."

Geron (GERN Quote): "Speculation. Not for me. Don't want to come near it. It's up too high. If you want biotech, I've got two offerings on the table." Cramer recommended Gilead Sciences (GILD Quote) and Celgene (CELG Quote).

Patterson-UTI Energy (PTEN Quote): "I have not liked this company historically. ... But natural gas is back up. ... Patterson is a land driller, and I think it has room to catch up to King Hal," or Halliburton (HAL Quote), which Cramer owns for his charitable trust, Action Alerts PLUS.

Saks (SKS Quote): "Let the stock come in. ... I was not concerned about gross margins. I think it's a chance to buy. ... You do a schnitzel, my friend, not a full buy."

Schering-Plough (SGP Quote): "The fact that I ever sold this great stock for my Action Alerts PLUS charitable trust is really disheartening. ... My advice to you, take half off and let the rest run. ... This stock's a double, but it's still going up."