Opioids are a class of drugs that include heroin, morphine, and oxycodone. They are used to relieve pain, but they can also be addictive. Opioid addiction is a serious problem in the United States, with over 2 million people addicted to opioids in 2017.

There are a number of factors that contribute to opioid addiction, including the drug's high potential for abuse, the ease with which it can be obtained, and the lack of effective treatment options.

Researchers are working to develop new opioids that are less addictive. One approach is to develop drugs that have a lower affinity for the opioid receptors in the brain. This would make them less likely to produce euphoria and addiction.

Another approach is to develop drugs that have a shorter duration of action. This would make them less likely to cause physical dependence.

Finally, researchers are also working to develop drugs that have built-in mechanisms to prevent addiction. For example, some drugs are being developed that release an antagonist that blocks the opioid receptors after a certain period of time.

These are just some of the ways that researchers are working to make opioids less addictive. With continued research, it is possible that we will one day be able to prevent opioid addiction from becoming a serious problem.

Here are some specific examples of drugs that are being developed to be less addictive:

* Buprenorphine is a partial opioid agonist that is used to treat opioid addiction. It has a lower potential for abuse than other opioids, and it can help to reduce cravings and withdrawal symptoms.

* Methadone is a full opioid agonist that is also used to treat opioid addiction. It has a long duration of action, which makes it less likely to cause withdrawal symptoms.

* Naltrexone is an opioid antagonist that is used to prevent opioid relapse. It blocks the effects of opioids, and it can help to reduce cravings and prevent relapse.

These are just a few examples of the many drugs that are being developed to be less addictive. With continued research, it is possible that we will one day be able to prevent opioid addiction from becoming a serious problem.