Orlistat can be sold to adults with a body mass index at least:

• A. 25 kg/m2
• B. 30 kg/m2
• C. 28 kg/m2
• D. 23 kg/m2

Answer: (C)

Eligibility for selling orlistat to adults is based on a BMI threshold that signals a level of overweight where pharmacotherapy can be appropriate alongside lifestyle changes. In this context, orlistat can be sold to adults with a BMI of at least 28 kg/m^2. This is the smallest value among common thresholds that still qualifies for treatment in this setting, whereas lower values (like 25 or 23) fall into overweight or normal weight and would not meet the criterion, and a higher threshold (such as 30) would also qualify but isn’t the minimum. Orlistat works by inhibiting intestinal lipase, reducing fat absorption, and is used with a reduced-calorie diet; it is important to monitor for gastrointestinal side effects and potential impacts on fat-soluble vitamins.