Researchers are looking for a better way to treat people who have vasomotor symptoms (VMS). The symptoms of VMS are hot flashes. These symptoms can be caused by changes in sex hormone levels. An example of a change in sex hormone levels is when a woman reaches the time in their life where they no longer have their period. Hormones are substances in the blood that help body organs to work in specific ways. Women who no longer have their period may have a protein called neurokinin sending more signals than usual to other parts of the body. Researchers think that this may play a role in causing VMS. In this study, the researchers want to learn more about a new substance called elinzanetant. Researchers think elinzanetant may help people with VMS. It works by blocking neurokinin from sending signals to other parts of the body. There are treatments available for VMS, but these do not work for all people and may cause medical problems for some people. The main purpose of this study is to help the researchers learn more about how elinzanetant moves into, through and out of the body in participants with kidneys that do not work as well as they should compared to healthy participants whose kidneys work normally. To do this, the doctors will take blood samples from the participants at different times during the study and measure the levels of elinzanetant in the blood. This will help the researchers learn more about whether elinzanetant could be given to treat VMS in people who also have kidneys that do not work as well as they should. This study will include adult participants who have kidneys that do not work as well as they should and participants whose kidneys work normally. The participants who have kidneys that do not work as well as they should will be split into 2 groups based on how severe their kidney problems are. All of the participants will take elinzanetant once as a tablet by mouth. The participants will be in the study for about 1 month and will stay at their study site for 7 days in a row. During this visit, the participants will: * have their overall health checked * have scans of their heart taken using an electrocardiogram * have blood and urine samples taken * answer questions about how they are feeling, what medications they are taking, and what adverse events they are having The doctors will keep track of any adverse events. An adverse event is any medical problem that a participant has during a study. Doctors keep track of all adverse events that happen in studies, even if they do not think the adverse events might be related to the study treatments.
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Area under the concentration vs. time curve in plasma from zero to infinity (AUCu) (unbound)
Timeframe: Predose up to 120 hours
Maximum observed (unbound) drug concentration (Cmax,u)
Timeframe: Predose up to 120 hours