All of the following are third generation antipsychotics except,

A. Avoidant/restrictive food intake disorder (ARFID) is an eating disorder characterized by extreme food restriction, leading to nutritional deficiencies, weight loss, or dependence on supplements. Unlike anorexia, it is not driven by body image concerns but rather by sensory sensitivity, fear of choking, or lack of interest in eating.

B. Pica involves the persistent consumption of non-nutritive, non-food substances (e.g., chalk, paper, dirt) for at least one month. It is commonly associated with nutritional deficiencies (e.g., iron or zinc deficiency), pregnancy, and developmental disorders such as autism.

C. Rumination disorder is characterized by repeated regurgitation of food, which may be re-chewed, re-swallowed, or spit out. It is seen in infants, children, and individuals with intellectual disabilities and is not due to a gastrointestinal or medical condition.

D. Food picking disorder. There is no recognized disorder called "food picking disorder" in the DSM-5. While some individuals may display picky eating behaviors, this does not qualify as a clinical diagnosis unless it significantly impairs nutritional intake, as seen in ARFID.

A. Tachycardia. Stimulants (e.g., methylphenidate, amphetamines) increase dopamine and norepinephrine levels, leading to sympathetic nervous system activation. This can cause tachycardia, increased blood pressure, and palpitations, making cardiovascular monitoring important in patients taking stimulants.

B. Decreased appetite. Stimulants suppress appetite, often leading to weight loss and nutritional deficiencies in children and adolescents. This is due to their effect on the hypothalamus, which regulates hunger and satiety.

C. Delayed growth. Chronic stimulant use has been associated with temporary growth suppression in children, possibly due to reduced appetite and changes in growth hormone regulation. However, growth typically normalizes after drug holidays or discontinuation.

D. Drooling (sialorrhea) is not a side effect of stimulants. Instead, it is more commonly associated with antipsychotics like clozapine, which cause excessive salivation due to muscarinic receptor effects. Stimulants, if anything, may cause dry mouth rather than drooling.