Your teen's behavior may change if they become involved with drugs.
They may be much more secretive, hide in their room, interact less with
the family (although some of this is normal in all teens, the teen involved
with drugs may carry it to an extreme.)
Their friendship group may change to a less-desirable crowd.
Their school grades and behavior may suffer and they may lose interest
in activities such as sports or after-school clubs that they formerly
enjoyed.
They may change their style of dress.
Money or other valuables may seem to disappear from their room as they
use them to obtain drugs.
Some teens can hide their drug use better than others. It is possible
to test the urine or blood for drug use, but the teen's physician will usually
want the consent of the teen to do the testing. Many store including Rite
Aid have over the counter drug tests for sale for about $39.
If you suspect your teen may be having a problem with drugs, contact
your teen's doctor or a local drug rehab center and have the teen assessed.
Try to not be punitive in your approach, but explain that you are worried
about your teen's health.
Sites to See:
ASKACOP.org