<prompt> Following are the propeies of Biguanides, EXCEPT:Decrease hepatic gluconeogenesisNot contraindicated in renal dysfunctionCan be used along with sulfonylureasDont stimulate insulin Release  <response>: Biguanides are contraindicated in patients with renal failure, congestive hea failure, alcoholism and hepatic diseases. Ref: Richard Finkel, Michelle Alexia Clark, Pamela C. Champe, Luigi X. Cubeddu 2009, Pharmacology, 4th Edition, Lippincott Williams and Wilkins Publications, United States Page 292 