as a bystander, the approach doesn’t work when drugs or alcohol are involved, as the person you’re trying to stop is more likely to become defensive or hostile.

Indirect object

Example: She gave a present to her Here, She is subject, gave is verb, a present is direct object cuz it is a object and to her is indirect. (In this sentence, the present is given to her, which answers the question "To Whom")

Hope this will be useful.