Food and Drug Administration officials announced Friday that they will begin posting a list of drugs that present the risk of giving strange “adverse events." The list includes adverse events reported between Jan. 1 and March 31, 2008. FDA officials say it will be "weeks or months" before more recent reports are made. The unveiled list has 20 drugs that are currently under investigation.

Warnings have already been sent out by the FDA. Drugs such as Insulin U-500 (Humulin R) or Tumor Necrosis Factor (TNF) Blockers are among the ones from the list. The first is suspected to create dosing confusion, while the latter may be responsible for cancers in children and young adults. However the report does not say how many people were affected by these possible drug reactions, nor does it give any indication of their severity.

The list includes a wide range of medicine, beginning with plain painkillers like Purdue Pharma LP’s Oxycontin to antidepressants like Cymbalta from Eli Lilly & Co.

The list, which the FDA will start issuing quarterly, is aimed at giving consumers and health-care professionals early indications of what the FDA is investigating. No verdicts can yet be given as they don’t have the final results. Its purpose is strictly informative.

"My message to patients is this: Don't stop taking your medicine," said Dr. Janet Woodcock, who heads the FDA's Center for Drug Evaluation and Research. "If your doctor has prescribed a drug that appears on this list, you should continue taking it unless your doctor advises you differently."

The drugs that are currently on the list were chosen because of reports received from hospitals, doctors and patients.