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Men's Anti-Contraceptive: Drug Proven Efficacy in New Tests

Men's Anti-Contraceptive: Drug Proven Efficacy in New Tests

After years of marketing and using the female birth control pill, a new method, this time for men, should hit the market. Vasalgel is not like a male pill, because its form of action is more like a "reversible vasectomy," according to Eduardo Bertero, general coordinator of the Department of Andrology of the Brazilian Society of Urology (SBU). the first tests of the drug, made with rabbits, proved the efficacy of contraception and the reversibility of the method. Vasalgel was now used in 16 adult monkeys at the California National Primate Research Center in the United States.

The animals were monitored for two years while living free with fertile females for at least one breeding season. "The treated males have had no conception since the Vasalgel injections," according to the researchers, in an article in Basic and Clinical Andrology. In general, about 80% of females would become pregnant in a common setting, living with males without the gel.

Few side effects were noted: one animal had spermatic granuloma (accumulation in the vas deferens), something quite common in a patient had a vasectomy. The possibility of reversing the method has not yet been tested in monkeys, but in rabbits the gel was successfully removed through a sodium bicarbonate solution.

How it works

Developed by the American company Parsemus Foundation, Vasalgel is a hormonal method. "The drug is made up of a gel, applied directly to the vas deferens, a canal that carries the spermatozoa from the testicle to the urethra," says the specialist. the canal, preventing only the passage of the spermatozoa, which do not stop being produced. In this way, the man continues to ejaculate normally in his sexual relations. "The great advantage is that, if the patient wants to become fertile again, he can ask the doctor to apply another substance capable of dissolving the gel", says Bertero.

Market entry

Despite speculation that Bertero believes it is risky to make predictions of this type, as the method has only been tested on animals so far.

Furthermore, the doctor alerts the many questions that are still a mystery about the subject matter. "It is not yet known how long the efficacy of the injection lasts, what is the margin of error of the method, if it is really reversible in the long run and what are the side effects," he points out. the use of condoms should not be dispensed with under any circumstances, as this is the main method for preventing sexually transmitted diseases STDs such as AIDS, hepatitis and syphilis. In addition, protection against unplanned pregnancy is even more effective with the use of the condom, which is distributed free of charge by the Unified Health System.


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