Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Children's Health

Font Size

Secondhand Smoke May Boost Risk of Learning Problems, ADHD

Researchers Urge Smoke-Free Home Policies to Reduce Effects
WebMD Health News
Reviewed by Laura J. Martin, MD

July 11, 2011 -- Children exposed to secondhand smoke in the home are more likely than children in smoke-free homes to develop behavior and learning problems, according to new research. These include learning disabilities, attention deficit hyperactivity disorder, and behavior and conduct disorders.

Worse, the problems often come in twos or more.

"We found that children who are exposed to secondhand smoke in the home have a 50% increased odds of having two or three of these common neurobehavioral disorders," says researcher Hillel Alpert, ScM, at the Harvard School of Public Health.

The study is published in the journal Pediatrics.

In the same issue, another study looked at how children's reaction to secondhand smoke may predict whether they will smoke.

Secondhand Smoke and Learning and Behavior Problems

For years, doctors have known that secondhand smoke can take a health toll on children. It increases the risk of respiratory problems, ear ailments, and other problems, Alpert says.

His team wanted to look at learning and behavior problems. They evaluated data from the 2007 National Survey of Children's Health. The telephone survey included more than 91,000 children. For this study, the researchers focused in on the 55,358 children younger than 12.

Of these 55,358 children, 6% were exposed to secondhand smoke in the home in 2007.

Parents reported if their child had been diagnosed or treated for ADHD, behavioral and conduct disorders, or learning disabilities.

''We analyzed the relationship between parents who reported smoking in the home as opposed to those not smoking in the home and these disorders," Alpert says.

He calls the 50% increased risk substantial. The findings do not prove cause and effect, he says, only a link.

Exactly how the smoke exposure is linked with the disorders is not known, Alpert says.

The study was supported by the Flight Attendants Medical Research Institute. Researchers included Zubair Kabir, MD, PhD, of the Tobacco Free Research Institute in Dublin.

Secondhand Smoke and Susceptibility Study

In a second study, Christina Lessov-Schlaggar, PHD, a research assistant professor at the Washington University School of Medicine, polled 165 children, aged 8 to 13, about their reaction to secondhand smoke in the home.

Today on WebMD

child with red rash on cheeks
What’s that rash?
plate of fruit and veggies
How healthy is your child’s diet?
smiling baby
Treating diarrhea, fever and more.
Middle school band practice
Understanding your child’s changing body.

worried kid
jennifer aniston
Measles virus
sick child

Child with adhd
rl with friends
Syringes and graph illustration