Yet the programs offered, for many poor patients, a luxurious level of medical care and the chance to try promising drugs.

Several promising new drugs are being tested, and we hope one or more will have further potential.

The company has had to abandon what it hoped were promising drugs in the past.

When promising drugs were finally tested in humans they came with serious side effects, some of which took months or years to appear.

Now one exists, and other promising drugs are in the pipeline.

It is also a promising drug in many cancer therapies.

Some promising drugs isolated from natural sources are already in development.

Many promising drugs have shown serious problems once they became widely prescribed.

And the biotechnology companies with the most promising drugs under development would not come cheap.

Relief is not in sight: experts say no promising new drugs are close to being approved.