After how many weeks of therapy should weight loss drugs be discontinued if they do not produce at least a 5% weight loss?

One should continue taking weight loss drugs for at least 12 weeks before deciding to discontinue them if there is not at least a 5% weight loss. This is because it takes time for the drugs to be fully effective and for a noticeable change in weight to occur. B, 8 weeks, is too soon to determine the effectiveness of the drugs. A, 4 weeks, is even shorter and may not give enough time for the drugs to take effect. D, 16 weeks, may be too long to wait and individuals should consult with their doctor if they do not see any results after 12 weeks.