Lexapro, the brand name of a prescription selective serotonin reuptake inhibitor, or SSRI is used to treat depression and anxiety. Lexapro, like any SSRI medication, can cause serious withdrawal effects when discontinuing the medication too abruptly.

Ritalin is the brand name for methylphenidate, a stimulant used to treat Attention deficit hyperactivity disorder, or ADHD, in children and adults. ADHD is a psychiatric disorder characterized by inattention, impulsivity, and hyperactivity.

Helminth infections -- worm infections -- are a major cause of illness worldwide. Even though public sanitation has led to a decreasing rate of helminth infections in the United States, worms can still cause infection when you travel, eat undercooked meats, or fall victim to poor sanitation.

Depressants are so called because they depress, or slow down, central nervous system functioning. This causes physical depression, lowered inhibitions, sedation, sleep, anesthesia, unconsciousness and potentially coma and death.

Even the most laid-back people sometimes experience anxiety. While occasional anxiety is a normal experience, frequent anxiety may signal a mental or physical disorder. Anxiety originates in your brain but triggers many physical responses.

Lithium carbonate is a medication used frequently as a first line treatment for bipolar disorder. It is toxic in high doses. Toxic levels are more likely with kidney or heart disease, dehydration, or use of diuretic drugs or ACE inhibitors, a class of drugs often used for high blood pressure.

Molds have several deleterious effects on human health. Pathogenic (disease-causing) molds gain access to the body in several ways, including through the foods we eat, through broken skin and the air we breathe.

Serotonin is an important chemical in your body that is responsible for a number of physiological functions and brain processes, such as mood and sleeping. Along with dopamine and norepinephrine, it is chemically categorized as a monoamine neurotransmitter.

If you have the odd feeling that the word around you is unreal, dreamlike or distorted, you are experiencing a moment of derealization. This psychiatric symptom can be scary, but if it's a mild feeling that passes quickly, it isn't necessarily cause for concern. Derealization is not a common side effect of caffeine.

Schizophrenia is a mental disorder in which patients see the world differently from the rest of the population, unable “to tell the difference between real and unreal experiences, to think logically, to have normal emotional responses, and to behave normally in social situations,” according to the National Institutes o

Anxiety--the way your body reacts to dangerous situations--is a normal biological function. However, when your anxiety response occurs even when there is no specific threat, it can become an anxiety disorder. Symptoms of anxiety include muscle tension, restlessness, insomnia, stomach pains, and excessive sweating.

Most adults with autism have likely possessed their personality traits since early childhood, but were either overlooked or misdiagnosed. Autistic traits from childhood can persist into adulthood, but with a wide range of outcomes depending on the severity of the disorder.