Interpersonal Therapy for Depression: How IPT Works

Interpersonal psychotherapy (IPT) is a structured, time-limited talk therapy for depression that works on your current relationships and life changes rather than on your thinking patterns. In its standard form it runs about 12 to 16 weekly sessions and centers on one of four problem areas: grief, a struggle with someone important, a major life transition, or social isolation.

IPT is one of the most studied psychotherapies for depression. Meta-analyses find it clearly more effective than no treatment and about as effective as other evidence-based therapies, including cognitive behavioral therapy (CBT). It has also been tested for postpartum depression and, in an adapted form called IPT-A, for teenagers.

What makes IPT different from other talk therapies

IPT starts from a simple observation: depression often follows a disturbing change in your interpersonal world, such as a death, a conflict with a partner, or a move or career change, and once you are depressed, the symptoms make relationships harder, so more bad events follow. The therapy works on that loop from the relationship side. Its developers describe the link between mood and life events as practical, not a claim that the event "caused" the depression.

A few features set IPT apart:

• Depression is framed as a treatable illness that is not your fault. The therapist gives you the temporary "sick role," which recognizes that depression keeps you from functioning at full capacity for now.
• There is no formal homework. Solving the chosen interpersonal problem becomes the overall task, and sessions focus on your life outside the office.
• The goal is to change relationship patterns rather than to target depressive thoughts directly, which is the main contrast with CBT.
• The time limit is deliberate. It is meant to encourage action rather than open-ended exploration.

The UK's National Institute for Health and Care Excellence (NICE) describes IPT as possibly helpful for depression linked to interpersonal difficulties, especially adjusting to changes in relationships, loss, or changing roles, and notes that it needs a willingness to look at your relationships.

The four problem areas

Early in treatment you and the therapist review your important relationships and recent life events, then agree on a focus.

The developers themselves call "interpersonal deficits" a confusing term: it really means the absence of a current life event, and it is used as the focus only when none of the other three areas applies. Whatever the focus, the work usually includes practice in asking for what you need, treating anger as a normal signal rather than something to suppress, and taking reasonable social risks.

Grief is worth a note. Most grief does not need treatment, and IPT's grief focus is aimed at depression that develops around a loss. The guide to when grief needs treatment explains the difference, and the practice's article on grief and loss covers the experience more broadly.

How a course of IPT runs

IPT has three phases inside its acute time limit.

NICE's 2022 depression guideline describes IPT as usually 8 to 16 sessions for less severe depression and usually 16 sessions for more severe depression, with extra sessions when other health problems, complex social needs or residual symptoms are present. In practice, the number is set with your therapist at the start, and progress is tracked against it.

A typical middle-phase session starts with a review of the past week's events. When you handled an interaction well, the therapist reinforces what worked. When it went badly, the therapist offers sympathy, you look together at what went wrong, and you role-play alternative responses. Over time the aim is for you to manage these situations without the therapist's help. The guide to how long therapy takes compares IPT's timeline with other approaches.

What the research shows in adults

The evidence for IPT in adult depression is broad. A 2011 meta-analysis in the American Journal of Psychiatry pooled 38 studies with 4,356 patients. Against control conditions, IPT had a clear effect (effect size 0.63), and against other psychological treatments there was no significant difference. The authors concluded that IPT deserves its place in treatment guidelines as one of the most empirically validated treatments for depression.

A broader 2016 meta-analysis covered 90 studies with 11,434 participants across mental health problems. For acute depression it again found moderate-to-large effects against control groups and no significant difference compared with other therapies or with medication. The earlier 2011 analysis, by contrast, found medication slightly more effective than IPT alone after one outlying study was removed. The fair summary is that IPT and antidepressants are in the same broad range for many people, with the comparison depending on which studies are included.

Combining IPT with medication

The 2016 analysis found combined treatment more effective than IPT alone. For staying well, the 2011 analysis found that maintenance treatment combining IPT and medication prevented relapse better than medication alone, and the 2016 analysis found that maintenance IPT reduced relapse. Whether to add or continue medication is a decision for you and your prescriber; the guide to medication, therapy or both walks through how that choice is usually made.

Beyond depression

IPT has been studied outside depression too. The 2016 meta-analysis found significant effects in eating disorders, though probably slightly smaller than CBT's in the acute phase, and large effects compared with control groups in anxiety disorders. It also found that IPT for people with subthreshold symptoms helped prevent the onset of major depression.

NICE lists IPT among the treatment options for both less severe and more severe depression, while ranking the options in each table by its own reading of clinical and cost-effectiveness. For a wider view of where IPT sits next to medication, exercise and neuromodulation, see depression treatment options compared.

IPT during pregnancy and after birth

The perinatal period is a natural fit for IPT because it combines a major role transition with changes in sleep, relationships and support. In a 2000 trial, 120 women with postpartum major depression were randomized to 12 weeks of IPT or a waiting list. On the clinician-rated depression scale, 37.5% of women who received IPT recovered, compared with 13.7% on the waiting list. The authors described IPT as an alternative to medication, particularly for women who are breastfeeding.

Prevention has evidence too. In 2019 the US Preventive Services Task Force gave a B recommendation that clinicians provide or refer pregnant and postpartum people at increased risk of perinatal depression to counseling interventions. One program it reviewed, ROSE, uses an interpersonal approach with 4 or 5 prenatal group sessions and 1 individual postpartum session; across trials, CBT-based and IPT-based programs showed similar effects. The Task Force notes the topic is being updated.

Medication decisions during pregnancy and breastfeeding are individual and should be made with a prescriber who knows your history. The guides to postpartum depression treatment options and psychiatric medications during pregnancy cover those choices, and the practice's article on depression and anxiety in pregnancy adds background.

IPT for teenagers (IPT-A)

IPT-A is a version of IPT modified for depressed adolescents. In a 2004 trial in five school-based mental health clinics in New York City, 63 adolescents with depression were randomized to IPT-A or usual treatment for 16 weeks. Those who received IPT-A had fewer clinician-rated depression symptoms and better overall and social functioning.

Guidelines place IPT-A as an alternative rather than the default. NICE's 2019 guideline for children and young people recommends individual CBT for at least 3 months for 12- to 18-year-olds with moderate to severe depression, and suggests considering IPT-A, family therapy, brief psychosocial intervention or psychodynamic psychotherapy if CBT would not meet the young person's needs. Parents weighing therapy and medication for a teenager can find more in teen depression treatment: a parent's guide.

IPT vs CBT: how they compare

Because the two perform similarly on average, the better choice usually comes down to fit. If your depression clearly started around a loss, a conflict or a life change, and you would rather talk through real interactions than fill in thought records, IPT is a reasonable first choice. If you are drawn to structured exercises and want tools for catching and testing thoughts, CBT may suit you better. The comparison of CBT and psychodynamic therapy and the guide to behavioral activation describe two other options with good evidence.

When IPT fits, and when something else should come first

IPT tends to fit when there is an identifiable interpersonal context and you have enough energy to work on it week to week. It may fit less well, or need to be combined with other care, in a few situations:

• Severe depression, depression with psychotic symptoms, or a possible bipolar disorder. These call for a psychiatric evaluation, and medication decisions belong with a prescriber.
• Depression that keeps returning after recovery. Relapse prevention has its own evidence base; see MBCT for preventing depression relapse.
• A relationship in which you are being hurt or controlled. Safety comes before work on the relationship, and a joint session with that partner is not appropriate; the guide to types of couples therapy explains why.
• Depression driven mainly by withdrawal and inactivity, where a more behavioral approach may be a closer match.

If you are thinking about suicide or are in crisis, call or text 988 (the 988 Suicide & Crisis Lifeline) or go to the nearest emergency room.

Finding a trained IPT therapist

Many therapists use interpersonal ideas without delivering IPT as a structured treatment. NICE specifies that IPT should be delivered by a practitioner with therapy-specific training and in line with current treatment manuals. Questions worth asking:

• Have you had formal training in IPT, and do you deliver it as a time-limited course?
• How many sessions do you expect, and how will we measure whether my depression is improving?
• How do we choose the problem area, and what happens if a second issue comes up mid-course?
• Do you work with teenagers or with perinatal patients, if that applies to me?
• How do you coordinate with a psychiatrist or other prescriber if I also take medication?
• What is the plan after the course ends: stopping, monthly maintenance sessions, or something else?

The practice's article on choosing a therapy for depression offers more on matching a therapist to your situation.

What the evidence does not show

• It does not show that IPT is better than CBT, or the reverse, for the average person.
• It does not settle whether IPT plus medication beats IPT alone for everyone; the 2011 review said there were too few studies to draw definite conclusions, while the 2016 review found an advantage for combined treatment.
• Most trials in the 2016 review carried some risk of bias, although the authors found little sign that this changed the results.
• It does not tell you in advance whether you personally will respond. That is why session-by-session measurement and a review point partway through matter.

How this practice approaches therapy for depression

The practice's ongoing care includes psychotherapy, including CBT and DBT, alongside psychiatric evaluation and medication management, with psychiatrists, psychiatric nurse practitioners and psychotherapists on one team. Whether a particular therapist delivers IPT is a good question for the free discovery call, which covers care options, scheduling and insurance. You can read about the team's approach to psychotherapy and begin with the Patient Interest Form. More guides on choosing care are collected in Choosing Psychiatric Care.

Frequently asked questions

Is IPT the same as relationship counseling?

No. IPT treats one person's depression by working on their relationships and life changes. Your partner or family members do not usually attend, although couples versions of IPT have been tested in research.

Can IPT be done by telehealth?

IPT has been tested in telephone formats, and it can also be delivered by video. Ask the therapist how they run sessions remotely and whether you need to be in a particular state for the visit.

What if my depression has no obvious trigger?

IPT still applies. When there is no recent loss, dispute or transition, the focus becomes social isolation and building connections. If that does not feel like a fit, CBT or behavioral activation are well-supported alternatives.

Will I have to talk about my childhood?

Not usually. IPT focuses on current relationships and recent events. Past patterns can come up in the review of your relationships, but the therapy does not center on early history the way psychodynamic therapy can.

How will I know if IPT is working?

Your therapist should measure symptoms at the start and track them through the course, for example with a questionnaire such as the PHQ-9. If there is little change by the middle of the course, ask about adjusting the plan or adding other treatment.

Can I do IPT while taking an antidepressant?

Yes. Research has studied IPT alone and together with medication. Do not change or stop a medication on your own; discuss any change with your prescriber.

Sources

1. Interpersonal psychotherapy: principles and applications. World Psychiatry (Markowitz JC, Weissman MM), 2004. pmc.ncbi.nlm.nih.gov
2. Depression in adults: treatment and management (NG222), Recommendations. National Institute for Health and Care Excellence (NICE), 2022. nice.org.uk
3. Interpersonal psychotherapy for depression: a meta-analysis. American Journal of Psychiatry (Cuijpers P et al.), PubMed 21362740, 2011. pubmed.ncbi.nlm.nih.gov
4. Interpersonal Psychotherapy for Mental Health Problems: A Comprehensive Meta-Analysis. American Journal of Psychiatry (Cuijpers P et al.), PubMed 27032627, 2016. pubmed.ncbi.nlm.nih.gov
5. Efficacy of interpersonal psychotherapy for postpartum depression. Archives of General Psychiatry (O'Hara MW et al.), PubMed 11074869, 2000. pubmed.ncbi.nlm.nih.gov
6. Perinatal Depression: Preventive Interventions, Final Recommendation Statement. US Preventive Services Task Force, 2019. uspreventiveservicestaskforce.org
7. A randomized effectiveness trial of interpersonal psychotherapy for depressed adolescents. Archives of General Psychiatry (Mufson L et al.), PubMed 15184237, 2004. pubmed.ncbi.nlm.nih.gov
8. Depression in children and young people: identification and management (NG134), Recommendations. National Institute for Health and Care Excellence (NICE), 2019. nice.org.uk

Educational information, not medical, tax or legal advice. Decisions about diagnosis, medication and treatment belong with a clinician who knows your history.