ICU: The Intensive Care Unit of a hospital.

IEP: Individualized Education Plan.  A plan of action developed by a Multi-Disciplinary Team outlining specialized services for a student. See related article on IEP

Impotence: The inability for a male to have an erection.

Incubation Period: The time period between the time a person contracts a STD until they get sick.

Infertility: The inability of a woman to conceive, usually after trying to conceive for more than a year.

Inhalants: Inhalants are generally household products that are huffed or sniffed by children and adolescents in order to get high called "huffing".  Some inhalants include, but are not limited to, white out, spray paint, cleaning fluids, model glue, paint thinner, hair spray, gasoline and nail polish remover.  The more advanced huffers will use Nitrous Oxide.  See related article on Inhalants

Injecting Drugs: When drugs are put into the body by using a needle or syringe.

Inpatient Treatment: Treatment a patient receives while residing in a hospital or treatment center. (See Residential Treatment)

Intercourse: See Sexual Intercourse

Internet: An enormous collection of computer networks that makes up the World Wide Web. See related article Online Safety