PROSCAR
One of the drugs of the future for controlling BPH may be a product now in final testing by Merck & Co. called Proscar. This drug blocks an enzyme that stimulates prostate growth. The Merck researchers say that the male hormone testosterone undergoes changes in the prostate gland and this is believed to be the primary factor in unwanted prostate growth when a man gets into his 40’s and 50’s and later.
By blocking this enzyme and refusing to let it change the testosterone, it would also stop the growth of the prostate.
Researchers say they are still in testing on the drug but it is in human clinical trials, one of the last of the procedures.
Using 350 patients in one clinical test, the drug reduced the size of enlarged prostates an average of twenty-eight percent. One third of the test patients also had a “dramatic improvement” in their urine flow.
Dr. John McConnell, assistant professor of urology at the University of Texas Southwestern Medical Center in Dallas, said: “The drug is highly effective from a biochemical point of view. It does shrink the prostate.”
He went on to say since only about one-third of the patients had an improvement in urine flow, the drug is not applicable to all men or all BPH cases.
One advantage of the Proscar treatment is that it has resulted in no side effects, at least so far in the testing. Side effects have been the killer of most prostate drugs so far.
Proscar is in final testing and with success should win the Food and Drug Administration approval for sale in the “early 1990’s”. That could still mean that it’s three or four years away.
One drawback to Proscar has been determined so far. It takes “about three months” before the prostate shrinks enough to help in urinary flow problems.
Merck is excited about the new product from a breakthrough standpoint, but also because it could have a great financial future. The market for such a medication that works, is said to be in the hundreds of million of dollars a year. The quickly expanding male population in the “prostate years” adds to this sales potential. This is one product to watch closely.
Some drug industry spokesmen say Proscar and Merck may be facing a problem: getting urologists to prescribe a medication that could cut their income by reducing the 400,000 prostate surgeries a year. Most urologists discount this saying they welcome another tool to fight prostatic disease.

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