Meridia 15 mg was once a prescription medication aimed at helping people lose weight, thanks to its active ingredient, sibutramine hydrochloride. It worked by curbing appetite and making folks feel fuller, which was especially helpful for those struggling with obesity. Meridia functioned by tweaking the levels of certain neurotransmitters in the brain, namely serotonin, norepinephrine, and dopamine, to help reduce hunger and encourage a lower calorie intake. Doctors typically recommended it for individuals with a body mass index (BMI) of 30 or more, or 27 and above if they had obesity-related health issues like diabetes or high blood pressure, all while following a calorie-restricted diet and exercising.