Itâ€™s a difficult idea to swallow, but if you suspect your child is doing drugs there are several signs to look for. Be careful and donâ€™t get mad at your child just because you suspect it, because sometimes they arenâ€™t always using drugs. Look for these simple signs to help you know if they are using drugs or not. Look for their behavior in school. Teenagers that use drugs tend to care less about school. Watch their grades and attendance. If their grades are dropping and they are frequently absent from class, this may be a sign that they are using drugs. This also may be a sign for other typical teenage situation, so donâ€™t rely solely on their grades to confirm your suspicion. Look for changes in their attitude. Examples of this could be that once they were outgoing, and now they hardly talk to anyone. If they drop all their old friends and start hanging out with new crowds, this may be a sign also. They may become more temperamental as well, but that is also part of being a teenager, but with drugs, itâ€™s going to be a lot worse than your typical teenage attitude. Look for changes in their body as well. Red eyes are often a sign of becoming high. Your child may be losing weight as well, which can be a sign. They may begin to not sleep as well or may seem hung over at times. Donâ€™t automatically assume your child is taking drugs. Many of these signs are seen in typical teenagers that arenâ€™t taking drugs. You can assume a drug problem when these things change dramatically at relatively at the same time. For example, many teenagers let their grades drop slightly because they are stressed out, but when they begin failing classes, you can assume a larger problem than stress.