A toddler eats only a handful of foods; parents are concerned but he is growing adequately. A teenager stops eating solid meals after choking and now experiences school refusal. A school-age child who avoids food unless he is convinced that the food is not contaminated. These situations can look similar from the outside, but they may have different explanations.

Avoidant/restrictive food intake disorder, or ARFID, involves restricted food intake that significantly affects nutrition, growth, or everyday functioning. Recognizing it requires understanding both the consequences of restriction as well as the origin of what makes eating difficult. When evaluating eating/feeding disorders, I like to remind myself that it is more than “How much does this person eat?” It is also, “What happens when they try?” and “How does the person develop this eating pattern?”

Understanding these differences helps clinicians answer whether the difficulty is due to ARFID or other conditions mimicking ARFID.

What Makes Restrictive Eating ARFID?

Under DSM-5, ARFID involves an eating or feeding disturbance associated with a persistent failure to meet appropriate nutritional or energy needs. At least one of four consequences must be present:

• Significant weight loss, or inadequate weight gain or growth in children.

• Significant nutritional deficiency.

• Dependence on tube feeding or oral nutritional supplements.

• Marked interference with social or everyday functioning.

The diagnosis also requires careful exclusions, which I will discuss further below.

Three Common Ways ARFID Presents

Sensory sensitivity. Food texture, smell, taste, temperature, or appearance can make eating intensely uncomfortable. A person might tolerate one brand of crackers but reject another, gag at mixed textures, or struggle when familiar food looks different.

Low interest in eating. Some people experience little appetite or motivation to eat. Meals feel like work, hunger is easily overlooked, or fullness arrives quickly. Restriction may involve insufficient quantity rather than a narrow food selection.

Fear of adverse consequences. Others avoid eating because they fear choking, vomiting, pain, or another unpleasant outcome. Restriction may begin after a frightening experience and spread from one food to entire categories.

These patterns can overlap. They describe common presentations rather than separate, formally defined DSM-5 subtypes. A person may have longstanding sensory sensitivities and develop additional avoidance after vomiting.

What Are the Mimickers of ARFID?

Food preferences alone do not establish a disorder. A child who dislikes vegetables but eats adequately, grows as expected, and participates comfortably in daily activities may not have ARFID.

The distinction is the degree of nutritional or functional disruption. Consider a child who cannot eat during the school day, avoids birthday parties, and needs extensive preparation before leaving home because acceptable foods may be unavailable. Even if their weight appears reassuring, the restriction deserves evaluation.

Families sometimes accommodate eating difficulties so effectively that impairment becomes less visible. Packing separate meals and avoiding restaurants may keep daily life manageable while concealing how much restriction controls the family’s choices.

Assessment should therefore consider what would happen without these accommodations, alongside the person’s actual nutritional intake and functioning.

Anorexia Nervosa and Other Eating Disorders

The central distinction is the meaning of restriction. In anorexia nervosa, assessment looks for fear of weight gain, behaviors that prevent weight gain, and disturbances involving body weight, shape, or recognition of low-weight severity. In ARFID, sensory discomfort, low interest, or feared eating consequences are common explanations.

The same behavior can have different meanings. Avoiding bread might reflect fear of weight gain, an intolerable texture, fear of choking, or medically necessary gluten avoidance.

A denial of wanting to lose weight does not settle the diagnosis. Some people have difficulty describing their motives, and younger children may communicate them through behavior. Clinicians should explore calorie rules, body checking, exercise, responses to weight restoration, and whether higher-energy versions of acceptable foods provoke distress.

Body dissatisfaction also needs context: its presence does not automatically explain every eating difficulty. Mixed or changing presentations require reassessment rather than a diagnosis based on one answer.

Obsessive-Compulsive Disorder

OCD can interfere with eating through intrusive fears and repetitive behaviors intended to reduce distress or prevent a feared event. Someone may repeatedly check expiration dates, wash utensils, seek reassurance about contamination, or follow elaborate rules before taking a bite.

I like to ask what the person fears and what function the behavior serves. Rejecting food because its texture causes gagging differs from rejecting it because an intrusive thought says it is contaminated. Repeating a swallowing ritual to prevent harm suggests a different mechanism from avoiding solids after choking.

However, these examples are clues, not diagnostic shortcuts. In my experience, ARFID and OCD can coexist, and food-related rituals do not automatically establish OCD. Symptoms outside meals can help clarify the broader pattern.

Trauma-and-Stressors-Related Disorders

A frightening eating experience can contribute to avoidance without establishing PTSD. For example, after choking, a person may become afraid of swallowing and progressively restrict solid foods.

PTSD requires a qualifying traumatic exposure and a broader pattern involving intrusion, avoidance, changes in mood or beliefs, and heightened arousal. A history of trauma alone is insufficient. Assessment should explore whether meals trigger memories, nightmares, dissociation, or a sense of present danger. 

Eating difficulties may also occur in environments where meals have involved threats or coercion. I have taken care of patients where eating is difficult because it reminds them of the dinner times, where domestic violence, physical or emotional abuse has happened.

Autism-Related Food Selectivity

Autistic people may have sensory sensitivities, strong preferences for predictability, or difficulty tolerating changes in familiar meals. These features can overlap with ARFID’s sensory presentation.

Autism does not automatically establish or exclude ARFID. The question is whether the feeding disturbance produces the required nutritional or functional consequences and is sufficiently severe to warrant separate attention.

During evaluation, I distinguish between a preference that can be supported and restriction that compromises health or participation. The goal is not to make everyone eat identically; it is to understand whether the person can reliably meet their needs or whether the food restriction is causing functional impairment.

Depression, Anxiety, and Medication Effects

Depression can reduce appetite alongside low mood, loss of pleasure, fatigue, or other symptoms. Anxiety may cause nausea or make eating difficult during periods of intense worry. Medication effects can also contribute to reduced intake.

The timeline is useful. Did restriction predate the other symptoms? Did it begin after a medication change? Does eating improve when mood or anxiety improves? Are persistent sensory difficulties or eating-specific fears also present?

These questions help clarify the origin of reduced food intake.

Medical and Gastrointestinal Conditions

The last but not least, I always urge both clinicians and parents to consider medical and gastrointestinal conditions. Pain, nausea, swallowing difficulty, reflux, constipation, food allergy, celiac disease, or other illnesses can make eating genuinely difficult. A psychiatric assessment should not replace an appropriate medical evaluation. 

Where Medication Fits

Given I am a psychiatrist, I would like to focus the treatment section to focus on the medication. There is currently no FDA-approved medication specifically for ARFID. ARFID medication evidence largely comes from retrospective studies and case reports, often involving patients receiving intensive nutritional and behavioral treatment at the same time. Therefore, improvement cannot reliably be attributed to medication alone. ARFID treatment generally combines medical monitoring, nutritional rehabilitation, and an intervention that addresses the eating pattern.  Medications are adjuncts to this work. 

Mirtazapine

Mirtazapine is an antidepressant that can increase appetite and cause weight gain. Clinicians sometimes consider it when low intake occurs alongside anxiety, poor sleep, or nausea. Its use for ARFID is off-label, and it is not FDA-approved for pediatric patients. 

A 2025 retrospective study reviewed 87 hospitalized children and adolescents with ARFID; 38 received mirtazapine. Its use was associated with faster weight gain, shorter hospitalization, and fewer days requiring nasogastric feeding. All patients received treatment in a medical stabilization program [1].

These findings support further research, but they do not prove that mirtazapine caused the improvements or establish it as the best medication for ARFID.

Common concerns include sleepiness, dizziness, and increased appetite or weight. Like other antidepressants, it carries a boxed warning about increased suicidal thoughts and behaviors in children, adolescents, and young adults, requiring clinical monitoring. 

Selective Serotonin Reuptake Inhibitors (SSRIs), Such as Sertraline and Fluoxetine

SSRIs are particularly relevant when co-morbid OCD, anxiety, depression or PTSD contributes to restriction. Their strongest rationale is often treatment of the coexisting condition, rather than a direct effect on ARFID. 

Cyproheptadine

Cyproheptadine is an antihistamine sometimes used off-label to stimulate appetite. It may be considered when low appetite is a major barrier, particularly in younger children.

A retrospective pediatric feeding-program study reported improved weight gain and parent-reported feeding behavior among children taking it alongside feeding intervention. However, this was a broader feeding-difficulty population, not a controlled ARFID-specific trial [2].

Olanzapine and Other Atypical Antipsychotics

Some specialist programs use low-dose olanzapine as an adjunct for severe cases. These antipsychotic medications are powerful, but they can also have many unfavorable side-effects, such as sedation, metabolic issues and in some cases movement disorders. Thus, I usually reserve those as the medication of last resort and only after weighing risks and benefits carefully. 

What If Someone Takes ADHD Medication?

Stimulants can suppress appetite, so an ARFID assessment should include medication timing, dose, and changes in food intake.

Nevertheless, stimulants do not always need to be discontinued. A 2023 case series described 10 young people with ADHD and ARFID who restored weight while continuing stimulants in a structured partial-hospital or intensive-outpatient program. Some required medication adjustments or additional medication. This does not establish that the same approach will work in routine outpatient care; it shows the importance of the treatment setting and nutritional support [3].

Take Home Message

The first step in treating ARFID is a comprehensive evaluation that carefully considers what is driving the eating difficulties, including other conditions that can resemble or coexist with ARFID. Taking the time to understand these factors can make a meaningful difference in developing a treatment plan that fits the person’s needs. 

How SageMind Psychology Can Help

Restrictive eating rarely shows up on its own. Anxiety, OCD, depression, trauma, ADHD, sensory differences, and family stress often appear alongside it and can make mealtimes harder for everyone. At SageMind Psychology, our clinicians provide evidence-based treatment for children, teens, families, and adults facing these concerns. That includes anxiety and OCD treatment for intrusive fears and rituals, treatment for depression and other mood disorders, EMDR therapy for frightening or traumatic experiences, and Dialectical Behavior Therapy (DBT) for emotion regulation. We also offer neurodivergent-informed therapy, ADHD support, and psychological assessments to help clarify what’s driving the difficulties. We offer therapy in person in Brooklyn Heights and virtually in 40+ additional states. Schedule a complimentary 15-minute consultation or contact us to find the right next step.

About the Author

Dr. Soe Thein is a double board-certified child, adolescent, and adult psychiatrist at North Star Psychiatry in New York City. He completed his psychiatry residency and child and adolescent psychiatry fellowship at UC Davis. His approach combines evidence-based treatment with psychoanalytic psychotherapy, emphasizing a thoughtful understanding of each person’s symptoms, relationships, and life experiences. He runs a popular online channel called Good Enough Psychiatrist.

References

1. Chishti A et al. (2025). Mirtazapine and shorter hospital stay in pediatric ARFID. doi:10.1002/eat.24449.

2. Sant’Anna AM et al. (2014). Cyproheptadine in a pediatric feeding program. doi:10.1097/MPG.0000000000000467.

3. Finn DM et al. (2023). Stimulant medication in youth with ADHD and ARFID. doi:10.1186/s40337-023-00954-1.