Letters advising doctors of the new warning were sent out last month, but the information was not posted on the agency Web site until yesterday.

The agency advised doctors to quiz their patients about allergies to the substance.

If a patient had a fever, he advised doctors to use cucumber.

But lawyers and medical groups are advising doctors to be careful.

They are issuing new guidelines advising doctors when, and when not, to order 15 common diagnostic tests costing $30 billion a year.

His mother is a pediatric hematologist-oncologist, a lawyer and an independent consultant who advises doctors on legal issues, in Highland Park.

The company has now advised doctors to give Eprex intravenously.

For example, some companies advise doctors to bill for a consultation instead of an office visit, which many insurers do not pay for.

Mental health specialists advise primary doctors on difficult cases, and patients with symptoms of severe depression are referred to psychiatrists or psychologists.

The agency has advised doctors whose patients await surgery to consider using valves from other companies.