How Can I Help Someone Who Is Addicted to Drugs?

The most important thing to do when you suspect someone of using is to confront him, never alone, but with another loved one who also cares about the person, asking them frankly what's going on. This is not an intervention by profession also you have to tread somewhat softly. But most importantly letting someone know that you're onto them, that there's help available, that you're willing to go to any lengths to assist them in seeking some help usually is the best approach.