For most of its history, the U.S. Food and Drug Administration approved new prescription medicines at a grudging pace, paying daily homage to the physician''s creed, ``First, do no harm.''''

Then in the early 1990s, the demand for AIDS drugs changed the political climate. Congress told the FDA to work closely with pharmaceutical companies in getting new medicines to market more swiftly. President Clinton urged the FDA to trust industry as ``partners, not adversaries.''''

The FDA achieved its new goals, but now the human cost is becoming clear. Seven drugs approved since 1993 have been withdrawn after reports of deaths and severe side effects. A two-year investigation by the Los Angeles Times has found that the FDA approved each of those drugs while disregarding danger signs or blunt warnings from its own specialists.

Then, after learning of significant harm to patients, the agency was slow to seek withdrawal of the products from the market.

According to ``adverse-event'''' reports filed with the FDA, the seven drugs were cited as suspects in 1,002 deaths. Because the deaths are reported by doctors, hospitals and others on a voluntary basis, the true number of deaths could be far higher, according to epidemiologists.

An adverse-event report does not prove that a drug caused a death; other factors, such as preexisting disease, could play a role. But the reports are regarded by public health officials as the most reliable early warnings of danger.

The FDA''s performance was tracked through an examination of thousands of pages of government documents, other data obtained under the Freedom of Information Act and interviews with more than 60 present and former agency officials.

The seven drugs were not needed to save lives. One was for heartburn. Another was a diet pill. A third was a painkiller. All told, six of the medicines were never proven to offer lifesaving benefits, and the seventh, an antibiotic, was ultimately judged unnecessary because other, safer antibiotics were available.

KNOWN FOR SPEED

The seven are among hundreds of new drugs approved since 1993, a period during which the FDA has become known more for speed than caution. In 1988, only 4 percent of new drugs brought to the world market were approved first by the FDA. In 1998, the FDA''s first-in-the-world approvals spiked to 66 percent.

The drug companies'' batting average in getting new drugs approved also climbed. By the end of the 1990s, the FDA was approving more than 80 percent of applications for new products, compared with about 60 percent as the decade began.

The seven unsuccessful drugs alone generated U.S. sales exceeding $5 billion before they were withdrawn.

Once the world''s unrivaled safety leader, the FDA was the last to withdraw several new drugs in the late 1990s that were banned by health authorities in Europe.

``This track record is totally unacceptable,'''' said Dr. Curt Furberg, a professor of public health sciences at Wake Forest University. ``The patients are the ones paying the price. They''re the ones developing all the side effects, fatal and nonfatal. Someone has to speak up for them.''''

The FDA''s faster and more lenient approach helped supply pharmacy shelves with scores of new remedies. But it has also yielded these fatal missteps, according to the documents and interviews:

Only 10 months ago, FDA administrators dismissed one of its medical officer''s emphatic warnings and approved Lotronex for treating irritable bowel syndrome. The drug has been linked to five deaths, the removal of a patient''s colon and other bowel surgeries. It was pulled off the market Nov. 28.

The diet pill Redux, approved in April 1996 despite an advisory committee''s vote against it, was withdrawn in September 1997 after heart-valve damage was found in patients put on the drug. The FDA later received reports identifying Redux as a suspect in 123 deaths.

The antibiotic Raxar was approved in November 1997 in the face of evidence that it may have caused several fatal heart-rhythm disruptions in clinical studies. FDA officials excluded any mention of the deaths from the drug''s label. The maker withdrew the pill in October 1999. Raxar was cited as a suspect in 13 deaths.

The blood pressure medication Posicor was approved in June 1997 despite findings by FDA specialists that it might fatally disrupt heart rhythm and interact with other drugs, a potentially severe risk. Posicor was withdrawn a year later; reports cited it as a suspect in 100 deaths.

The painkiller Duract was approved in July 1997 after FDA medical officers warned repeatedly of its liver toxicity. Senior officials sided with the manufacturer in softening the label''s warning of the liver threat. The drug was withdrawn 11 months later. By late 1998, the FDA had received voluntary reports citing Duract as a suspect in 68 deaths, including 17 that involved liver failure.

The diabetes drug Rezulin was approved in January 1997 over a medical officer''s detailed opposition and was withdrawn last March after the agency had linked 91 liver failures to the pill. Reports cite Rezulin as a suspect in 391 deaths.

The nighttime heartburn drug Propulsid was approved in 1993 despite evidence that it disrupted heart rhythm. The officials who approved it failed to consult the FDA''s own cardiac specialists about the danger signs. The drug was taken out of pharmacies in July after scores of confirmed heart-rhythm deaths. Overall, Propulsid is cited as a suspect in 302 deaths.

CHILDREN AT RISK

The FDA''s handling of Propulsid put children at risk.

The agency never warned doctors not to administer the drug to infants or children even though eight youngsters given Propulsid in clinical studies had died. Pediatricians prescribed it widely for infants afflicted with gastric reflux, a common digestive disorder.

Parents and their doctors had no way of knowing that the FDA, in August 1996, had found Propulsid to be ``not approvable'''' for children.

``We never knew that,'''' said Jeffrey Englebrick, a heavy-equipment welder in Shawnee, Kan., whose 3-month-old son, Scott, died Oct. 28, 1997, after taking Propulsid. ``To me, that means they took my kid as a guinea pig to see if it would work.''''

By the time the drug was pulled, the FDA had received reports of 24 deaths of children under age 6 who were given Propulsid. By then the drug had generated U.S. sales of $2.5 billion for Johnson & Johnson Co.

Questions also surround recent approvals of other compounds that remain on the market, including a new flu drug, Relenza. In February 1999, an FDA advisory committee concluded that Relenza had not been proven safe and effective. The agency nevertheless approved it. After seven patients died, the FDA last January issued a ``public health advisory'''' to doctors.

In just the past three years, 10 drugs have been pulled from the market for safety reasons. Three of those were approved before the shift that took hold in 1993. Never has the FDA overseen the withdrawal of so many drugs in so short a time. More than 22 million Americans -- about 10 percent of the nation''s adult population -- took those drugs.

With many of the drugs, the FDA used tiny-print warnings or advice in package labeling as a way to justify approvals or stave off withdrawals. In other instances, the agency has withheld from labels safety information that physicians say would call into question the use of the product.

Present and former FDA specialists said decisions of senior officials have clashed with the agency''s central obligation, under law, to ``protect the public health by ensuring . . . that drugs are safe and effective.''''

``They forget who it is that they are ultimately serving,'''' said Dr. Lemuel Moye, a University of Texas School of Public Health physician who served from 1995 to 1999 on an FDA advisory committee. ``Unfortunately the public pays for this, because the public believes that the FDA is watching the door, that they are the sentry.''''

IMPACT IS FELT

Dr. William Isley, a Kansas City, Mo., diabetes specialist, implored the agency to reassess Rezulin three years ago after a patient he treated suffered liver failure taking the pill.

``FDA used to serve a purpose,'''' Isley said. ``A doctor could feel sure that a drug he was prescribing was as safe as possible. Now you wonder what kind of evaluation has been done, and what''s been swept under the rug.''''

FDA officials said that they have tried conscientiously to weigh benefits versus risks in deciding whether to approve new drugs. They noted that many doctors and patients complain when a drug is withdrawn.

``All drugs have risks; most of them have serious risks,'''' said Dr. Janet Woodcock, director of the FDA''s drug-review center. Some of the withdrawn drugs, she said, were ``very valuable, even if not lifesaving, and their removal from the market represents a loss, even if a necessary one.''''

Once a drug is proven effective and safe, Woodcock said, the FDA depends on doctors ``to take into account the risks, to read the label. . . . We have to rely on the practitioner community to be the learned intermediary. That''s why drugs are prescription drugs.''''

In a May 12, 1999, article coauthored with FDA colleagues and published by the Journal of the American Medical Association, Woodcock said, ``The FDA and the community are willing to take greater safety risks due to the serious nature of the [illnesses] being treated.''''

Compared to the volume of new drugs approved, they wrote, the number of recent withdrawals ``is particularly reassuring.''''

However, agency specialists point out that both approvals and withdrawals are controlled by Woodcock and her administrators. When they consider a withdrawal, they face the unpleasant prospect of repudiating their original decision to approve.

Woodcock, 52, received her medical degree at Northwestern University and is a board-certified internist. She alluded in a recent interview to the difficulty she feels in rejecting a proposed drug that might cost a company $150 million or more to develop.

``Consumer protection advocates want to have drugs worked up well and thoroughly evaluated for safety and efficacy before getting on the market,'''' Woodcock wrote in the Food and Drug Law Journal in March 1997. ``On the other hand, there are economic pressures to get drugs on the market as soon as possible, and these are highly valid.''''

But last summer -- following the eighth and ninth drug withdrawals -- Woodcock said the FDA cannot rely on labeling precautions, alone, to resolve safety concerns.

``As medical practice has changed . . . it''s just much more difficult for [doctors] to manage'''' the expanded drug supply, Woodcock said in an interview. ``They rely upon us much more to make sure the drugs are safe.''''

Another FDA administrator, Dr. Florence Houn, told industry officials six months ago: ``I think the lessons learned from the drug withdrawals make us leery.''''

Yet the imperative to move swiftly, cooperatively, remains.

``We are now making decisions more quickly and more predictably while maintaining the same high standards for product safety and efficacy,'''' FDA Commissioner Jane Henney said in a speech at the National Press Club on Dec. 12.

The impetus for change at the FDA emerged in 1988, when AIDS activists paralyzed operations for a day at the agency''s 18-story headquarters in Rockville, Md. They demanded immediate approval of experimental drugs that offered at least a ray of hope to those otherwise facing death.

The FDA often was taking more than two years to review new drug applications. The pharmaceutical industry saw a chance to expedite an array of new products to market. The companies and their Capitol Hill lobbyists pressed for advantage: If unshackled, they said, the companies could invent and develop more remedies faster.

PRESSURE MOUNTED

The political pressure mounted, and the FDA began to bow. By 1991, agency officials told Congress they were making significant progress in speeding the approval process.

The emboldened companies pushed for more. They proposed that drugs intended for either life-threatening or ``serious'''' disorders receive a quicker review.

``The pharmaceutical companies came back and lobbied the agency and the Hill for that word, `serious,'' '''' recalled Jeffrey Nesbit, who in 1991 was chief of staff to FDA Commissioner David Kessler. ``Their argument was, `Well, OK, there''s AIDS and cancer. But there are drugs [being developed] for Alzheimer''s. And that''s a serious illness.'' . . . They began to push that envelope.''''

In 1992, Kessler gave the FDA discretion to ``accelerate approval of certain new drugs'''' for serious or life-threatening conditions. That same year a Democrat-controlled Congress approved and then-President Bush signed the Prescription Drug User Fee Act. It set goals for the FDA to review drugs within six months or a year; the pharmaceutical companies pay a user fee to the FDA, now $309,647, upon filing each new drug application.

The Clinton administration climbed aboard wih its ``reinventing government'''' project. Headed by Vice President Al Gore, the project called for the FDA, by January 2000, to reduce ``by an average of one year the time required to bring important new drugs to the American public.'''' As Clinton put it on March 16, 1995, the objective was to ``get rid of yesterday''s government.''''

For the FDA''s medical reviewers, a new order had taken hold.

One reviewer was Michael Elashoff, a biostatistician who arrived at the FDA in 1995.

``From the first drug I reviewed, I really got the sense that I was doing something worthwhile. I saw what a difference a single reviewer can make,'''' said Elashoff, the son and grandson of statisticians.

Last year he was assigned to review Relenza, the new flu drug developed by Glaxo Wellcome. He recommended against approval.

On Feb. 24, an agency advisory committee voted 13-4 against approving Relenza.

Senior FDA officials upbraided Elashoff. They stripped him of his review of another flu drug. They told him he would no longer make presentations to the advisory committee. And they approved Relenza as safe and effective.

``Before I came to the FDA I guess I always assumed things were done properly. I''ve lost a lot of faith in taking a prescription medicine.''''

Elashoff left the FDA four months ago.

``The pressure to meet deadlines is enormous,'''' said Dr. Solomon Sobel, 65, director of the FDA''s metabolic and endocrine drugs division throughout the 1990s. And the pressure is not merely to complete the reviews, he said. ``The basic message is to approve.''''

POSSIBLE CONFLICTS

The perception of coziness with drug makers is perpetuated by potential conflicts of interest within the FDA''s 18 advisory committees, the influential panels that recommend which drugs deserve approval or should remain on the market. The FDA allows some appointees to double as consultants or researchers for the same companies whose products they are evaluating on the public''s behalf. Such was the case during committee appraisals of several of the recently withdrawn drugs, including Lotronex and Posicor, the Times found.

Over the last decade, the drug companies have steered $44 million in contributions to major political parties and to candidates for the White House and both houses of Congress.

The FDA reviewers said they and their bosses fear that unless the new drugs are approved, companies will erupt and Congress will retaliate by refusing to renew the user fees. This would cripple FDA operations.

The companies'' fees now cover about half of the FDA''s costs for reviewing proposed drugs -- and agency officials say that persuading Congress to renew the user fees into 2007 is a top priority.

Leading industry officials say Americans have nothing to fear from the wave of drug approvals.

``Do unsafe drugs enter and remain in the marketplace? Absolutely not,'''' said Dr. Bert Spilker, senior vice president for scientific and regulatory affairs for the Pharmaceutical Research and Manufacturers of America, in remarks last year to industry and FDA scientists.

But during interviews over the last two years, current and former FDA specialists cited repeated instances when drugs were approved with less than compelling evidence of safety or effectiveness.