Sullivan's stages of interpersonal development outline a series of stages that individuals go through as they develop interpersonal relationships. Late adolescence is the final stage in Sullivan's model, and it is characterized by a focus on self-actualization and the development of satisfying relationships with others. This stage is marked by an increased sense of autonomy and a desire for intimacy and emotional connection with others.
Infancy, juvenile, and pre-adolescence are all earlier stages in Sullivan's model that are marked by different developmental goals and challenges. Infancy is characterized by the development of a sense of trust and the establishment of basic interpersonal skills, while juvenile and pre-adolescence are marked by the development of peer relationships and social skills.

Rumination disorder is characterized by a persistent regurgitation and chewing of food already eaten.
Pica is a psychiatric condition occurring when a patient eats material that is not food, such as soap, chalk, plaster, or paper. Enuresis refers to the repeated voiding of urine (either voluntarily or involuntarily) into bedding or clothing when five years old or older. Selective mutism is characterized by a child who chooses not to talk except when alone or with select friends or family.

Hyperactive and impulsive traits of ADHD are as follows:
* Fidgets
* Leaves seat
* Runs or climbs
* Is unable to engage in quiet activities
* Is always on the go
* Talks excessively
* Blurts out information
* Has a difficult time waiting their turn
* Interrupts others
Inattentive traits of ADHD include all of the following:
* Fails to give attention to details
* Has difficulty sustaining attention
* Does not listen when spoken to
* Does not follow through on instructions
* Is disorganized
* Avoids or dislikes tasks that require sustained mental effort
* Loses things
* Is distracted
* Is forgetful

Escitalopram is a selective serotonin reuptake inhibitor (SSRI). Other SSRIs include:
* Fluvoxamine
* Paroxetine
* Fluoxetine
* Sertraline
* Citalopram
Clomipramine, doxepin, and imipramine are tricyclic antidepressants (TCAs). Other TCAs include:
* Amoxapine
* Amitriptyline
* Desipramine
* Nortriptyline
* Trimipramine
* Protriptyline

Hepatic cytochrome P450 enzyme interactions can induce or inhibit the metabolism of certain drugs, thus changing their desired concentration levels.
Enzyme inducers decrease the serum level of other drugs that are substrates of that enzyme, possibly resulting in subtherapeutic drug levels. Inducers include carbamazepine, hypericum (St. John's wort), phenytoin, phenobarbital, and tobacco.
Enzyme inhibitors can increase the serum level of other drugs that are substrates of that enzyme, possibly resulting in toxic levels. Inhibitors include bupropion, clomipramine, duloxetine, fluoroquinolones, nefazodone, and the SSRI class.