Depression in children and young people: identification and management

As one of the most common paediatric psychiatric disorders, pharmacists and healthcare professionals need to be aware of the symptoms of depression and be able to assess children and young people who may be at risk.

Back of young school girl's head in class

Depression is a common illness; it is estimated that more than 300 million people worldwide are affected[1]
. It is different from usual mood swings and short-lived emotional responses to everyday challenges and may become a serious health disorder when it is long-lasting and with moderate or severe intensity. Not only can it cause the affected person to suffer significantly and perform poorly at work, school or in the family but, if left untreated, depression can also lead to suicide. According to the World Health Organization (WHO), more than 800,000 people die by suicide each year and it is the second leading cause of death in 15–29-year-olds[1]

People of any age, ethnicity or social background can suffer from depression. It is estimated that 1% of pre-pubertal children and around 3% of post-pubertal young people are diagnosed with depression[2]
. Depression is more common in older adolescents, and twice as many adolescent females are affected compared with adolescent males. The prevalence of childhood depression appears to be increasing; however, this may be owing to greater awareness and improved diagnosis[2]

A young person with depression may experience major difficulties with feelings and behaviour. This may cause problems at home, at school and in relationships. Some young people may be more likely to engage in riskier behaviours, such as missing school, harming themselves, misusing drugs or alcohol, and having inappropriate sexual relationships. Sometimes young people with untreated depression may have suicidal ideation.

Some young people with severe depression may develop psychotic symptoms, causing them to perceive or interpret things differently from those around them. For example, they may hear voices or see things that do not exist outside of their mind. A small number of young people also experience episodes of depression followed by symptoms of mania. In these cases, they may actually be suffering from bipolar affective disorder[3]

Depression is a treatable illness. Overall, 10% of children and young people with depression recover spontaneously within three months, and 50% recover within the first year[4]
. The first step towards getting help is to recognise that there might be a problem. Pharmacists and healthcare professionals in primary care should be able to recognise the symptoms of depression, and be able to assess children and young people who may be at risk. If necessary, they can then make a referral to the local Child and Adolescent Mental Health Service (CAMHS), which can offer specialist help.

This article outlines the four-tier strategic framework of CAMHS, how to diagnose depression, the various treatment options available (both pharmacological and non-pharmacological), and the role of the pharmacist and pharmacy team in managing and supporting children or young people and their carers.

The Child and Adolescent Mental Health Service

CAMHS usually provides coordinated care involving professionals in both primary and secondary care. There are four tiers within CAMHS, offering different areas of specialism[5]

  • Tier 1: Primary care services, including GPs, paediatricians, health visitors, school nurses, social workers, teachers, juvenile justice workers, voluntary agencies and social services;
  • Tier 2: CAMHS is provided by professionals working with primary care, including clinical child psychologists, paediatricians with specialist training in mental health, educational psychologists, child and adolescent psychiatrists, child and adolescent psychotherapists, counsellors, community nurses or nurse specialists, and family therapists;
  • Tier 3: CAMHS specialised services for more severe, complex or persistent disorders, including child and adolescent psychiatrists, clinical child psychologists, nurses or nurse specialists (community or hospital based), child and adolescent psychotherapists, occupational therapists, speech and language therapists, art, music and drama therapists, and family therapists;
  • Tier 4: Tertiary-level services (e.g. day units, highly specialised outpatient teams and inpatient units). The availability of services will vary depending on locality but all children should be seen by a specialist with experience in child and adolescent mental health.

When to refer

Pharmacists, pharmacy teams and other healthcare professionals should refer any child or young person to tier 2 or 3 CAMHS when:

  • They are at risk of self-harm or suicide (with active suicidal plans or ideas);
  • There is unexplained self-neglect (e.g. poor personal hygiene or weight loss owing to restrictive eating) with a minimum duration of one month that could be harmful to their physical health;
  • They have mild depression and:
    • Two or more risk factors for depression (e.g. family history of depression, alcohol or drug abuse, negative life events, other comorbidities etc);
    • One or more family member with multiple-risk histories for depression;
    • No improvement after four weeks of watchful waiting;
  • They have moderate or severe depression (including psychotic depression);
  • They have previously recovered from moderate or severe depression but begin to show signs of recurrence of depression;
  • There is severe impairment of functioning at school or within the family and relationships.

Refer any child or young person to tier 4 CAMHS when:

  • There is a high recurrent risk of acts of self-harm or suicide;
  • There is significant ongoing self-neglect (e.g. poor personal hygiene or significant weight loss owing to restrictive eating that could be harmful to their physical health);
  • They require a level of intensity of assessment or treatment and/or level of supervision that is not available in tier 2 or 3.

Diagnostic criteria, signs and symptoms

Depression is thought to involve both genetic and environmental factors[6]
. Children or young people with parents or siblings who have depression are likely to be more susceptible to depression. Although there is no single factor that will lead to the onset of depression, there are factors that can act as potential triggers: comorbidities (e.g. anxiety or conduct disorder), alcohol and/or drug misuse, history of bullying or abuse, and recent negative life events (e.g. parental divorce or bereavement).

Chemical or organic causes of depression should also be ruled out and treated prior to diagnosis. For example, corticosteroids may cause or worsen depressive illness, and low levels of thyroid hormone may cause symptoms of depression. Further lists of psychiatric side effects of medicines are found in Maudsley Prescribing Guidelines[7]
and Psychotropic Drug Directory[8]

Depression is a broad diagnosis and different people may experience different symptoms. However, depressed mood and loss of pleasure in most activities are the main signs of depression. Depressive symptoms are frequently accompanied by symptoms of anxiety but may also occur on their own. The International Statistical Classification of Diseases (ICD-10) uses an agreed list of 10 depressive symptoms for the diagnosis of depression (see Box 1)[9]

Box 1: International Statistical Classification of Diseases (ICD-10) symptoms for the diagnosis of depression

Key symptoms

  • Persistent sadness or low mood, which may present as irritability;
  • Loss of interest or loss of pleasure (anhedonia);
  • Fatigue or low energy.

Other associated symptoms

  • Poor quality or increased need for sleep;
  • Poor concentration or indecisiveness;
  • Low self-confidence;
  • Poor or increased appetite;
  • Agitation or slowing of movements;
  • Guilt or self-blame;
  • Suicidal thoughts or acts.

For a diagnosis of depression, symptoms should be present for at least two weeks and at least two key symptoms should be present for most of the day. ICD-10 divides depressive episodes into four categories:

  • Not depressed (if there are fewer than four symptoms);
  • A mild depressive episode (if there are four symptoms);
  • A moderate-to-severe depressive episode (if there are five or six symptoms);
  • A severe depressive episode (if there are seven or more symptoms, with or without psychosis).

It is important to consider that depression in children and young people may have a more insidious onset than in adults. Irritability may be more prominent than sadness and often occurs contemporarily with other behavioural disorders. It is crucial to record the signs and symptoms in detail and accurately in the clinical notes, as the symptoms may not all be present at the same time and may fluctuate in severity.


The goal of treatment is to improve symptoms, prevent the illness from returning and help the child or young person reintegrate into regular life. Families play an important role in recognising the illness and supporting the individual through treatment.

Based on the severity of the depression, treatment should be tailored to meet the individual needs of the child or young person. If they exhibit severe symptoms or difficulties (e.g. having active suicidal thoughts or other risky behaviours), they may require medication and admission to hospital.


Psychotherapy, particularly cognitive behavioural therapy (CBT) and interpersonal therapy (IPT), is effective and generally recommended as first-line treatment for depression in children and young people[5]

Therefore, psychotherapy should be tried before considering other treatment options (e.g. medicines). However, this depends on the individual’s symptoms, and their personal circumstances and preferences.

Pharmacological treatments

Selective serotonin reuptake inhibitors (SSRIs) are indicated for moderate-to-severe depressive disorders in children and young people where effective psychological interventions are impractical or depression fails to respond to an adequate trial (at least three months) of psychotherapy. In practice, around 60% of young people with depression will have an adequate response to initial treatment with an SSRI[10]
. Switching to another SSRI and/or adding CBT is beneficial for many who do not respond to the first SSRI. Antidepressant medicines should not be used for the initial treatment of children and young people with mild depression, should not be used as the sole intervention and should only be initiated after specialist consultation.

Both United States (US) and European authorities warn about the increased risk of suicidal thoughts and behaviour in patients aged under 18 years being treated with antidepressants. However, an increased risk of completed suicide has not been demonstrated[11]

Nevertheless, the National Institute for Health and Care Excellence (NICE) suggests that prescribers should review treatment on a weekly basis, especially during the first four weeks of drug treatment.

Before starting treatment, informed consent must be sought from the child or young person and/or someone with parental responsibility for them. If the individual is aged over 16 years, they alone can give consent, if deemed competent (see Box 2).

Box 2: What to do when prescribing antidepressants for depression in children and young people


  • Seek consent from the child or young person and/or someone with parental responsibility for them. If the individual is aged over 16 years, they alone can give consent, if deemed competent.

Drug mechanism, duration and side effects

  • Explain the rationale for the drug treatment;
  • Explain the delay in onset of action (i.e. it usually takes two to four weeks for symptoms to improve, although some people note an improvement within a few days of treatment);
  • Explain the time course of treatment (i.e. antidepressants should be taken for at least six months after the individual has recovered to reduce the risk of relapse. People who are at high risk of relapse may need to take them for longer than this. Some people may, under medical supervision, be able to stop their medication when they have recovered and have felt well for a while);
  • Explain that antidepressant drugs are not addictive;
  • Explain that they need to take the medication as prescribed and should not stop them suddenly. This helps to prevent discontinuation symptoms from arising (e.g. nausea, diarrhoea, headache, paraesthesia, anxiety and flu-like symptoms). This advice is particularly important for drugs with a shorter half-life (e.g. paroxetine);
  • Explain that some antidepressants potentially have sedating effects and may affect the person’s ability to drive. This effect is likely to be greatest in the first month after starting treatment or increasing the dose. The Driver and Vehicle Licensing Agency (DVLA) advises that people who are affected should not drive during this time.

Other information

  • Provide them with written information (e.g. patient information leaflets) that are tailored to the child’s or young person’s and parents’ or carers’ needs;
  • Tell them to be vigilant for worsening depressive symptoms and suicidal ideas, particularly when starting and changing medications, and at times of increased personal stress. Advise them to seek help promptly if they are concerned;
  • Provide them with details of their next planned review and information on who to contact if they experience adverse effects or other issues during treatment.

Source: National Institute for Health and Care Excellence. Depression in children and young people: identification and management. Clinical guideline [CG28]. September 2017. Available at: (accessed April 2018)

SSRIs are the most widely prescribed type of antidepressants. They are believed to increase the extracellular serotonin concentration by inhibiting its reabsorption into the presynaptic cell. This causes an increase in serotonin availability at the synaptic cleft to bind to the postsynaptic receptors. SSRIs have weak but varying degrees of affinity for the noradrenaline and dopamine transporters, which is why some people may respond to one SSRI and not another.

SSRIs are generally well tolerated but they are not free from side effects. The most common side effects (e.g. nausea, diarrhoea, insomnia and increased agitation) are usually transient and self-limiting, disappearing after a few days or weeks. It is important that the child or young person and their carers are informed about this and told not to stop the medication abruptly. Furthermore, they should be informed about the possibility of more serious adverse effects (e.g. suicidal ideation, gastrointestinal bleeding and serotonin syndrome[12]
) and be advised to seek medical attention immediately if these complications are suspected.

If a child or young person is responding to an antidepressant, treatment should be continued for at least six months after remission, where remission is defined as no symptoms and full functioning for at least eight weeks[5]

The use of antidepressants in the management of conditions other than depression is outside the remit of this article. For further advice, pharmacists and healthcare professionals should refer to specialist reference sources and their local mental health pharmacy team.


This is the only antidepressant licensed for the treatment of depression in children aged over 8 years, and evidence suggests that the benefits outweigh the risks in this population[5],[13]
. The starting dose should be 10mg daily; this can be increased to 20mg daily after one week if clinically necessary[14]
. There is little evidence regarding the effectiveness of doses of fluoxetine higher than 20mg daily, but higher doses may be considered in older children of higher body weight or when the illness is severe[5]

Fluoxetine is available as capsules, tablets, oral solution and dispersible tablets[14]
. The choice of formulation should be made on an individual basis taking into account the child or young person’s preference, the practicalities of administration, and the cost. For example, some young people are unable to take medicines in solid oral dosage forms because they have swallowing difficulties or feeding tubes. In these circumstances, the use of an oral solution or dispersible tablet may be more appropriate.

Fluoxetine can be offered in combination with psychological therapy[5]
. However, before doing this, several considerations should be made (see Box 3).

Box 3: When to offer psychological therapy with fluoxetine

  • The child or young person should have a multidisciplinary review after psychological therapy has been tried for four to six treatment sessions;
  • Following the multidisciplinary review, if the child or young person’s depression is not responding to psychological therapy because of other coexisting factors (e.g. comorbid conditions or persisting psychosocial risk factors, such as family discord or parental mental health problems), consider:
    • An alternative psychological therapy for the child or young person;
    • An alternative or an additional psychological therapy for the parent or other family members;
    • Offering fluoxetine in addition to psychological therapy if symptoms are unresponsive to a specific psychological therapy after four to six sessions.

Sertraline and citalopram

If treatment with fluoxetine is unsuccessful or is not tolerated because of adverse effects, sertraline and citalopram are recommended as second-line treatments[5]
(off-licensed use for the treatment of depression in anyone aged under 18 years). These should only be used when the following criteria have been met[5]

  • The potential benefits and risks of the new treatment have been documented and discussed with the child or young person and their carers;
  • The child or young person’s depression is severe and/or causing serious symptoms (e.g. weight loss or suicidal behaviour) to justify a trial of another antidepressant;
  • There has been a fair trial of the combination of fluoxetine and a psychological therapy, and all efforts have been made to ensure adherence to the recommended treatment regimen;
  • The likely causes of the depression and of treatment resistance have been reassessed (e.g. other diagnoses such as bipolar disorder or substance misuse);
  • Appropriate and up-to-date written information has been provided. This should cover the rationale for the drug treatment, the delay in onset of effect, the anticipated duration of treatment, the possible adverse effects, and the need to take medicines as prescribed.

There is little evidence regarding the effectiveness of high doses for children and young people, but these may be considered in older children of higher body weight or when the illness is severe.

Paroxetine and venlafaxine

Evidence available suggests that both paroxetine (SSRI) and venlafaxine have little impact on response to treatment, symptom levels, functional status, or clinical improvement in children and young people with depression[5],[15]
. Therefore, these medicines should not be used in patients aged under 18 years.

Tricyclic antidepressants

There is limited evidence to support the use of tricyclic antidepressants (TCAs) in the treatment of depression in children and young people. Owing to their propensity to cause side effects and toxicity in overdose[16]
, it is recommended that TCAs should not be used for the treatment of depression in this patient group[5]

Electroconvulsive therapy

This should only be considered for young people (aged 12–18 years) with very severe depression and either life-threatening symptoms or intractable and severe symptoms that have not responded to other treatments[13]
. NICE does not recommend electroconvulsive therapy for the treatment of depression in children aged under 11 years[5]

The role of the pharmacy team

A study has shown that around 50% of patients prematurely discontinued their antidepressant therapy within six months of initiation[17]
. Children, young people, and their parents and carers may have concerns that these medicines are addictive and have been linked with suicidal thoughts and behaviour, which may be a reason for the non-adherence to the prescribed medicine.

As experts in pharmacotherapy, pharmacists provide specialised skills and knowledge to other healthcare professionals within a multidisciplinary team, and contribute towards the improvement of patient outcomes by detecting and resolving or preventing drug-related interventions. In addition, pharmacists and pharmacy technicians play a vital role in supporting young people and their families in taking antidepressants, helping them to understand the benefits of taking the medicine, which subsequently improves medicine adherence. If the child or young person has achieved full remission, treatment should be reviewed and discussed between the multidisciplinary team, the child and their carers. If appropriate, support should be provided when weaning off the antidepressant, and the individual should be encouraged to discuss any discontinuation symptoms or any recurring depression symptoms.

Children or young people and their carers should also be reassured that antidepressants are safe and effective when they are monitored appropriately, particularly at the beginning of the treatment or if the dose has changed. In patients with moderate or severe depression, medicines can play an important part in managing this disabling condition.

Furthermore, pharmacists are in a unique position to assist in opportunistic screening for depression in the community setting as they are easily accessible to the public. Previous research has concluded that trained pharmacists may be equipped with the skills and knowledge to assist in the identification and support of people with a mental illness such as depression[18],[19],[20]
. Depression screening (e.g. the Patient Health Questionnaire or the WHO-5 Well-being Index)[21],[22],[23]
and risk assessment have the potential to increase early identification of the signs and symptoms of depression, and prompt a referral to the appropriate healthcare professional if necessary.


Depression is a common mental health disorder that all healthcare professionals will come into contact with. Therefore, pharmacists and healthcare professionals, especially those in primary care, should be able to detect the symptoms of depression, assess children and young people who may be at risk, and refer them to a specialist (i.e. CAMHS) if appropriate.

Mild depression is best treated with psychotherapies, while moderate or severe forms may require pharmacological treatments. Antidepressants are used for a variety of disorders, but only fluoxetine is currently licensed in the UK for treatment of moderate-to-severe depressive disorder in children and adolescents aged 8 years and older. Pharmacological treatment may be considered when patients are unresponsive to psychological therapy after 4–6 sessions, and only in combination with a concurrent psychological therapy.

Pharmacists and pharmacy technicians have an important role in engaging with patients, supporting their treatment, and assessing and promoting the importance of medicine adherence. Parents or carers should also be supported and encouraged to get involved in the child or young person’s medicine administration process. This is essential in achieving remission, restoring previous levels of functioning and preventing reoccurrence of depression.

Box: Useful resources

Organisations that offer materials and/or support to people with depression include:

Financial and conflicts of interest disclosure:

The authors have no relevant affiliations or financial involvement with any organisation or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. No writing assistance was used in the production of this manuscript.

Reading this article counts towards your CPD

You can use the following forms to record your learning and action points from this article from Pharmaceutical Journal Publications.

Your CPD module results are stored against your account here at The Pharmaceutical Journal. You must be registered and logged into the site to do this. To review your module results, go to the ‘My Account’ tab and then ‘My CPD’.

Any training, learning or development activities that you undertake for CPD can also be recorded as evidence as part of your RPS Faculty practice-based portfolio when preparing for Faculty membership. To start your RPS Faculty journey today, access the portfolio and tools at

If your learning was planned in advance, please click:

If your learning was spontaneous, please click:


[1] World Health Organization. Depression fact sheet. 2018. Available at: (accessed April 2018)

[2] National Institute for Health and Care Excellence. Clinical knowledge summaries. Depression in children. 2016. Available at: (accessed April 2018)

[3] National Institute for Health and Care Excellence. Bipolar disorder: assessment and management. Clinical guideline [CG185]. February 2016. Available at: (accessed April 2018)

[4] Harrington R & Dubicka B. Natural history of mood disorders in children and adolescents. In Goodyer I (Editor). The Depressed Child and Adolescent (Cambridge Child and Adolescent Psychiatry). Cambridge University Press. 2001;353–381. doi: 10.1017/CBO9780511543821.014

[5] National Institute for Health and Care Excellence. Depression in children and young people: identification and management. Clinical guideline [CG28]. September 2017. Available at: (accessed April 2018)

[6] Brigitta B. Pathophysiology of depression and mechanisms of treatment. Dialogues Clin Neurosci 2002;4(1):7–20. PMID: 22033824

[7] Taylor D, Paton C, Kapur S et al. The Maudsley Prescribing Guidelines in Psychiatry. 12 edn. Wiley Blackwell, London.

[8] Bazire S. Psychotropic Drug Directory 2016. Lloyd-Reinhold Publications, Stratford Upon Avon, UK.

[9] World Health Organization. The International Statistical Classification of Diseases and Related Health Problems (10th revision). Available at: (accessed April 2018)

[10] Cheung A, Emslie G & Maynes T. Efficacy and safety of antidepressants in youth depression. Can Child Adolesc Psychiatr Rev 2004;13(4):98–104. PMID: 19030487

[11] Mann J, Emslie G, Baldessarini R et al. ACNP Task Force report on SSRIs and suicidal behaviour in youth. Neuropsychopharmacology 2006;31:473–492. doi: 10.1038/sj.npp.1300958

[12] UKMi. Q&A 219.4: What is serotonin syndrome and which medicines cause it? 14 December 2016. Available at: (accessed April 2018)

[13] Tsapakis E, Soldani F, Tondo L & Baldessarini R. Efficacy of antidepressants in juvenile depression: Meta analysis. Br J Psychiatry 2008;193:10–17. doi: 10.1192/bjp.bp.106.031088

[14] British National Formulary for Children. Available at: (accessed April 2018)

[15] Cleare A, Pariante C, Young A et al. Evidence-based guidelines for treating depressive disorders with antidepressants: A revision of the 2008 British Association for Psychopharmacology guidelines. J Psychopharmacol 2015;29(5):459–525. doi: 10.1177/0269881115581093

[16] British National Formulary. Available at: (accessed April 2018)

[17] Trivedi M, Lin E & Katon W. Consensus recommendations for improving adherence, self-management, and outcomes in patients with depression. CNS Spectr 2007;12:1–27. PMID: 17986951

[18] Holma I, Holma K, Melartin T & Isometsa E. Treatment attitudes and adherence of psychiatric patients with major depressive disorder: a five-year prospective study. J Affect Disord 2010;127:102–112. doi: 10.1016/j.jad.2010.04.022

[19] Akerblad A, Bengtsson F, Holgersson M et al. Identification of primary care patients at risk of nonadherence to antidepressant treatment. Patient Prefer Adherence 2008;2:379–386. doi: 10.2147/ppa.s3511

[20] Brown C, Battista D, Bruehlman R et al. Beliefs about antidepressant medications in primary care patients: relationship to self-reported adherence. Med Care 2005;43:1203–1207. doi: 10.1097/01.mlr.0000185733.30697.f6

[21] Arroll B, Goodyear-Smith F, Crengle S et al. Validation of PHQ-2 and PHQ-9 to screen for major depression in the primary care population. Ann Fam Med 2010;8:348–353. doi: 10.1370/afm.1139

[22] Löwe B, Gräfe K, Zipfel S et al. Diagnosing ICD-10 depressive episodes: Superior criterion validity of the patient health questionnaire. Psychother Psychosom 2004;73:386–390. doi: 10.1159/000080393

[23] Houston J, Kroenke K, Faries D et al. A provisional screening instrument for four common mental disorders in adult primary care patients. Psychosomatics 2011;52:48–55. doi: 10.1016/j.psym.2010.11.011

Last updated
Clinical Pharmacist, CP, April 2018, Vol 10, No 4;10(4)::DOI:10.1211/PJ.2018.20204575

You might also be interested in…