What should i do if i suspect that my child is doing drugs?

I suggest locking your child in the house until they are 18! Ok, maybe not. I do believe that there are some basic steps to take, though.

Open the lines of communication.
HOW you approach your child on this issue will effect how open they are with you. If a child feels like they will risk losing your love and approval if they admit that they have tried drugs, you can bet that they will look you right in the eye and lie. This does not mean that you need to say to your kid, "Hey, be honest with me and there will be no consequences”; however, they need to know that you are coming from a place of concern for their health and safety, not from a place of judgment.

Educate yourself before you talk to your child.
Know what kind of drugs are popular these days. Also know the language. The drug scene is very different now than it was in the peace, love, and happiness days of Woodstock. It is always helpful to understand what the scene is like before confronting your child.

Get some help and support for you!
So many parents feel that they are alone in dealing with this issue, when in truth, there are many other parents who have been there with their own kids. Sometimes there is a sense of shame or embarrassment. Think of it as a health issue, not a moral issue. Talk to people who have experience in dealing with it.

I guess the final point that I would like to make is don't avoid dealing with it! in some cases, kids will use drugs and "grow out of it.” In other cases, kids will use drugs and go on to become addicted. I do believe that it is very helpful to address it sooner rather than later. Talk to your kids. Let them know you love them. Ask them how their day was. Help them with their homework if they need it. Buy them that puppy they have always wanted. (Just kidding about the puppy!) But, please, talk to them.