New injection creates long-lasting contraceptive implant

Scientists are working on a new injection that could create a long-lasting contraceptive implant inside the body. This could change how drugs are delivered, not just for birth control but also for conditions like HIV, TB, and chronic pain. Current contraceptive implants last for years but need to be put in by a doctor. On the other hand, contraceptive injections only last three months. The new method, still in testing, involves injecting micro-crystals of a synthetic hormone called progesterone along with a special solvent. Once injected, this solvent mixes with body fluids, prompting the micro-crystals to stick together and form a solid implant. The researchers tested this method in rats. They found that the drug could be released steadily for at least 97 days. With some adjustments, the release could be extended for years. The solid implant can also be removed when necessary, and a small needle can be used for the injection. Although promising, this research is still in early stages. Human trials are expected to begin in the next three to five years. Experts, like Dr. Janet Barter, believe this could greatly help people in areas with limited access to healthcare. They stress the importance of further research on safety and efficacy to ensure it meets the needs of potential users.