Goodman and Gilman's, while it may be the gold standard, is far too dense for dental and most medical students. It is probably more appropriate for pharmacy or pharmacology grad students. An appropriate, well written, concise text is Lippincott's pharmacology. If you'd like a text that also includes excellent review questions I'd go with Katzung and Trevor's Pharmacology (not Basic and Clinical Pharm by Katzung <--big text). Hope this helps.