I think my friend has an addiction problem. How can I help?

The first and most important thing you can do to help them is to LOVE. Sure, you may be against this addiction, but never be against the person! Your friend or whoever is going through this addiction problem must be having a hard time. Talk to your friend! Find out what's pushing them to turn to addictions! If they've told you about it or asked for help, that is great! Encourage them to talk to a professional and be with them long enough to see them become a better version of themselves! Remind them that they don't have to go through it alone and JUST LOVE! I am currently experiencing this (many of my friends are doing drugs) and would love to have a chat with you about it :)

you need to sit here down and calmly tell her how concerned you are for her in a positive manner so she can not feel the need to get her guard up

The first step is bringing up their addiction in a serious conversation. Show that you are genuinely worried about their well being and you may get through to them.

See if he would admit he has a problem. Ask about how work, relationships,life's problems are effecting his life. If he admits he might have a problem i would take him to a NA or AA meeting. 12 step

Talk to him, give him some examples of other people who have had addiction problems, where they have ended up.

Be there for them and try to put yourself in their shoes and understand what they might be going through. Consider offering professional helplines or professional psychology sessions.

If you want to help, just tell him/her that you're worried about him/her and that she/he has some addiction that you dislike, But first of all he/she needs to realise that it's a real issue for his/her health and wellbeing.

If you believe your friend suffers from any type of addiction, the most important thing to do is to maintain a supportive, non-judgmental character. Don't accuse your friend of anything. Go into the conversation "knowing" there is a problem that you need to tackle, but don't lose sympathy. Tell your friend how you feel. Ask your friend how he or she feels. Share personal experiences about loved ones or even yourself, if you'd like. Discuss the future. If your friend seems interested in helping himself/herself, then supply him/her with support group information.

You can help by talking to their parents / guardian as they can take further actions. You can contact a doctor or other medical professional who will guide you to take the appropriate steps. There are some great online support services like lifeline ect which a quick and easy first move to make.

First, talk to them about it. Tell them that you're concerned they might be falling into an addiction. If you're extremely concerned, bring it to their parents and explain the situation to them.