Sleep-phase advance

1. Introduction

Version followed: sleep-phase advance (SPA, German Schlafphasenvorverlagerung) as an antidepressant chronotherapy, in two published forms: (1) SPA used after a night of total sleep deprivation to hold on to the response, as studied by Riemann, Berger, Voderholzer and colleagues in depressed inpatients (1996, 1999, 2003); and (2) SPA as the middle step of "triple chronotherapy" (wake therapy, then SPA, then daily morning light), as framed in Wirz-Justice, Benedetti and Terman's clinician's manual (Karger, 2009) and in the South London and Maudsley feasibility protocol (2017). The treatment is planned and run by a psychiatric or sleep-medicine team. This guide is written for the psychotherapist working alongside that team. It gives no bedtimes, shift sizes or timing protocols. [source: Riemann et al. 1996; Riemann et al. 1999; Voderholzer et al. 2003; ISAD guidelines page; SLaM protocol NCT03405493]

What it is. For a few days the team moves the patient's sleep period earlier than usual, then moves it back step by step to the usual time. In the studies the shift and the return were done by the team on a fixed schedule. Patients did not choose their own times. [source: Riemann et al. 1999; Voderholzer et al. 2003] Sleep-phase advance as an antidepressant is usually traced to work by Wehr, Wirz-Justice, Goodwin and colleagues published in 1979. [uncertain: date and authors come from secondary listings only]

Core idea of how change happens. A night of total sleep deprivation (wake therapy, see 034 Wake therapy) quickly lifts mood in many people with depression, but the gain is usually lost after the next sleep. Riemann and colleagues put forward two explanations: there is a "critical period" in the early morning when sleep brings relapse, or the relapse comes from a release of non-REM sleep. By moving sleep earlier, SPA keeps the person awake through the hypothesised vulnerable window and then gently brings the sleep schedule back to normal. These are still research hypotheses, not established mechanisms. [source: Riemann et al. 1996; Riemann et al. 1999]

Not the same as treating delayed sleep-phase disorder. Delayed sleep-wake phase disorder (DSWPD) is a circadian rhythm sleep-wake disorder. The person's habitual sleep is persistently later than they need or want, and it is diagnosed and treated in sleep medicine. The American Academy of Sleep Medicine (AASM) 2015 guideline (Auger et al.) covers DSWPD with the other intrinsic circadian disorders. As summarised in the trade press, it endorses strategically timed melatonin and light therapy for select patients, and it made no recommendation on prescribed sleep-wake scheduling because the data were insufficient. [source: AASM news release; Guideline Central summary; Sleep Review 2015] In sleep medicine the word "chronotherapy" can also mean a different procedure for DSWPD, unrelated to antidepressant SPA. [uncertain: the AASM recommendation text on that procedure] Antidepressant SPA is a brief treatment for depression. It is given to people who need not have any circadian disorder, and it lasts only a few days. Do not merge the two in referrals or psychoeducation. [synthesis]

Regulatory and evidence status. As of October 2026: SPA is a schedule manipulation, not a drug or device, so it has no product licence. The light-therapy component used in triple chronotherapy uses a light device; see the light-therapy entries for eye-safety and switch cautions. [synthesis] The ISAD chronotherapeutics guidelines page presents the 2009 manual as its treatment guidance and lists SPA alongside light and wake therapy. The page asserts "nearly no side effects" and a strong evidence base; these are the authors' claims. [source: ISAD guidelines page] A meta-analysis of chronotherapy for the rapid treatment of depression (PROSPERO CRD42019127228) found a small evidence base: four small RCTs and twelve uncontrolled case series, mostly in inpatients, with protocols that varied. At day 5–7, chronotherapy was favoured over control (pooled g about 0.62). Whether the gains lasted to week 7–9 could not be determined. Side effects were not systematically reported. The authors called for larger RCTs with standardised protocols and at least six months of follow-up. [source: UCL Discovery meta-analysis manuscript; authors and journal not stated, so [uncertain]] No NICE or CANMAT recommendation specific to SPA is described in the sources. [uncertain] Treat SPA as a specialist, research-stage adjunct.

2. Framework

The stages below are how published studies and protocols arrange the treatment. The team sets all timings. [source: Riemann et al. 1999; Voderholzer et al. 2003; SLaM protocol] Psychotherapy contacts around each stage are [synthesis].

Stage 0 – Selection and assessment (team-led). Goal: decide whether chronotherapy is suitable and safe. The SLaM feasibility protocol excluded, among others: a history of bipolar disorder, schizophrenia or schizoaffective disorder; significant suicide risk requiring hospitalisation; epilepsy, stroke or uncontrolled severe headache; significant eye disease; untreated sleep disorders such as sleep apnoea or narcolepsy; photosensitising drugs; current night-shift work; recent substance misuse; dementia or organic brain disorder. In that protocol, antidepressants could continue if they had been stable for six weeks, with no planned changes. [source: SLaM protocol] Other research groups have studied SPA in bipolar depression with lithium, but only under specialist inpatient care. [source: meta-analysis study list citing Benedetti et al. 2001] Psychotherapist: passes on relevant history (past hypomania, suicidality, substance use, shift work), helps the client prepare questions, and supports consent. Move on when the team has confirmed eligibility and the client has given informed consent.

Stage 1 – Wake therapy (team-led; see 034). In the Riemann/Berger and Voderholzer studies, SPA was offered to people who had responded to one night of total sleep deprivation. Move on when the team judges that the person has responded. [source: Riemann et al. 1999; Voderholzer et al. 2003]

Stage 2 – Sleep-phase advance (team-led). Sleep is moved earlier and then returned to the usual time step by step, over a short block of days. The published versions (Voderholzer et al. 2003; Riemann et al. 1999; SLaM, with group-supported wakefulness) differ in how the advance and the return are scheduled; those details are set by the team and are not given here. In SLaM, a health care assistant supported participants during the hospital-based overnight and day sessions, and the team recorded adherence, including naps. [source: as cited] Format: mostly inpatient in the published studies. SLaM tested delivery to people referred from community services, with the sessions held in hospital. [source: meta-analysis; SLaM protocol] Watch for: early relapse. In the Voderholzer pilot, 10 of 25 responders relapsed during the advance or the two days after it, and two of those improved again by day 6. [source: Voderholzer et al. 2003]

Stage 3 – Stabilisation (team-led, with psychotherapy). In triple chronotherapy, daily morning light therapy, timed by the team to the patient's sleep pattern, follows the SPA days. Treatment as usual continues, including any prescribed medication. [source: SLaM protocol; MDedge 2010 report of Wirz-Justice] Psychotherapist: resumes regular sessions, supports keeping a regular daily routine, and monitors mood.

Stage 4 – Follow-up and relapse prevention. The SLaM protocol assessed at baseline and at weeks 1, 2, 4 and 8 and at 6 months, using clinician and self-report depression scales, a rumination scale, a sleep-quality index, sleep diaries and actigraphy, among other measures. [source: SLaM protocol] Psychotherapist: continues therapy for the depression, integrates CBT-I where insomnia persists, and keeps a relapse plan with the team. [synthesis]

When to stop or re-route (team decisions; flag them promptly): emerging hypomania or mania; acute suicidality (the SLaM protocol withdrew acutely suicidal participants); intolerable side effects; relapse that does not recover. [source: SLaM protocol; meta-analysis] [synthesis for the flagging role]

3. Guiding principles

The specialist team owns the schedule. Practically: never suggest bedtimes, wake times or shifts. Questions about timing go to the psychiatrist or sleep specialist. [synthesis, consistent with team-delivered protocols in the sources]
Present it as research-stage. Practically: tell clients that it can work quickly for some people, that the evidence is small and mostly from inpatients, and that whether gains last is uncertain. [source: meta-analysis]
Bipolar caution. Practically: raise any history of hypomania or mania with the team before treatment. In the meta-analysis, about 1% of bipolar patients (4 of 388, most of them on lithium) switched to mania. SLaM excluded bipolar disorder and warned both patient and carer about the theoretical risk of mania. [source: meta-analysis; SLaM protocol]
Keep it distinct from DSWPD care. Practically: do not use this protocol's logic for a client whose problem is a chronically late body clock. That needs a sleep-medicine assessment. [source: AASM 2015 guideline summaries] [synthesis]
Do not let your advice compete with the treatment schedule. Practically: during the SPA block, suspend any CBT-I sleep-window or wind-down instructions that might conflict, and re-introduce them afterwards with the team's agreement. [synthesis]
Prepare for early relapse. Practically: tell the client beforehand that mood may dip again during or just after the advance, and that this is information for the team, not personal failure. [source: Voderholzer et al. 2003] [synthesis for framing]
Monitor and pass on; never advise a change. Practically: record warning signs and contact the team. Never tell a client to stop, extend or alter the protocol or their medication. [synthesis]
Involve carers where the client agrees. Practically: carers help with staying awake, notice mood elevation and know whom to call. SLaM warned carers about mania risk. [source: SLaM protocol] [synthesis]
Safety outranks the protocol. Practically: acute suicidality means urgent review and withdrawal from the protocol, as in SLaM. [source: SLaM protocol]
Psychotherapy runs before, alongside and after. Practically: chronotherapy is offered on top of usual care; in SLaM, usual care could include behavioural activation and psychotherapy hours were recorded. Keep the therapeutic frame running throughout. [source: SLaM protocol]

4. Intervention inventory

Part A describes the treatment as published so that you can explain it accurately. It is a description only, never instructions; the team delivers it. Part B covers the psychotherapist's own interventions. Example wording is illustrative throughout.

Part A – The treatment as delivered by the team

A1. Sleep-phase advance after a response to total sleep deprivation

Purpose / when used: to keep the rapid antidepressant response to one night of total sleep deprivation from being lost after the next sleep. The Riemann/Berger studies used it in people with major depression who had responded to sleep deprivation. [source: Riemann et al. 1996; Riemann et al. 1999]
How it is delivered (descriptive): after the wake-therapy night, the team sets an earlier-than-usual sleep period. Over the next days it moves sleep back towards the usual time in planned steps until the original schedule is restored. The 1999 study and a 2003 pilot in medicated inpatients used different advance and return schedules, not reproduced here. [source: Riemann et al. 1999; Voderholzer et al. 2003] In the 1999 study, the comparison condition moved sleep later instead, and polysomnography showed that neither schedule produced prolonged sleep deprivation. [source: Riemann et al. 1999]
Published results (for accurate psychoeducation): about 75% of sleep-deprivation responders in the advance condition stayed well over seven days, against about 40% with phase delay (Riemann et al. 1999). Relapse was less frequent after advanced than after normally timed sleep (Riemann et al. 1996). In the 2003 pilot, which had no control group, 68% had at least 30% improvement at day 6. [source: as cited]
Watch for: relapse during or just after the advance; daytime sleepiness and napping, which the team will want to know about; mood elevation. [source: Voderholzer et al. 2003; SLaM protocol] [synthesis for the napping point]
Example language (illustrative): "After the night awake, the team will set your sleep earlier for a few days and then bring it back step by step. They choose the times; you won't need to work them out." [synthesis]

A2. Triple chronotherapy (wake therapy + sleep-phase advance + morning light)

Purpose / when used: to speed up and stabilise antidepressant response by combining three chronotherapeutic elements. The Wirz-Justice/Benedetti/Terman manual presents it for unipolar and bipolar depression, including for patients who refuse, resist or cannot tolerate medication. [source: ISAD guidelines page; Karger book page]
How it is delivered (descriptive): in the SLaM feasibility protocol, group-supported wakefulness with activities and staff support was followed by a staged shift of the sleep schedule over a few days. Daily bright light, timed by the team to each person's sleep pattern, came next. All of this was added to treatment as usual. The control arm received a written sleep-hygiene leaflet, a chance to ask questions, and dim amber light. The light dose and timings are set by the team and are not given here. [source: SLaM protocol]
Side effects reported in that protocol: tiredness, nausea and headache were expected; the team could reduce light exposure if side effects were significant; adverse events were recorded. [source: SLaM protocol]
Watch for: switch into hypomania or mania; worsening suicidality; eye discomfort or headache with the light (see the light-therapy entries); poor adherence to staying awake. [source: SLaM protocol; meta-analysis]
Example language (illustrative): "This combines a night awake, earlier sleep for a few days and daily bright light, all on the team's plan and on top of your usual treatment." [synthesis]

A3. Sleep-phase advance in bipolar depression with lithium (specialist research context)

Purpose / when used: studied by the Milan group (Benedetti et al. 2001) as SPA with lithium in bipolar depression. [source: meta-analysis study list] [uncertain: the 2001 paper's design and results are not described here]
Status: in pooled chronotherapy studies, switches to mania were uncommon (4 of 388 bipolar patients). Most of those who switched were taking lithium, and side effects were under-reported. Bipolar disorder was an exclusion criterion in the SLaM community protocol. [source: meta-analysis; SLaM protocol]
Psychotherapist's stance: never consider this outside a specialist mood-disorder or inpatient service. [synthesis]
Example language (illustrative): "With bipolar disorder this is only done in specialist services with mood-stabilising medication and close monitoring." [synthesis]
Watch for: clients with a bipolar history seeking it outside specialist care. Working: the history is passed to the team. [synthesis]

A4. Contrast: treatment of delayed sleep-wake phase disorder (sleep medicine)

Purpose / when used: to treat a persistent circadian delay, not depression. It is diagnosed and managed by a sleep specialist. [source: AASM 2015 guideline summaries]
How it is described: the AASM 2015 guideline (Auger et al., J Clin Sleep Med 11(10):1199–236) covers DSWPD. As summarised, it endorses strategically timed melatonin and light therapy, with or without behavioural measures, for select patients, and makes no recommendation on prescribed sleep-wake scheduling because of insufficient data. [source: Guideline Central; Sleep Review 2015] [uncertain: the full recommendation table, including the strength of each recommendation and any statement on bedtime-shifting "chronotherapy" for DSWPD]
Psychotherapist's stance: if a depressed client also has a lifelong very late sleep pattern with difficulty waking for obligations, suggest a sleep-medicine assessment. Do not frame antidepressant SPA as a fix for it. [synthesis]
Example language (illustrative): "A body clock that always runs late is a different problem from depression, and a sleep specialist is the right person to assess it." [synthesis]
Watch for: antidepressant sleep-phase advance being confused with treatment for a late body clock. Working: a sleep-medicine referral where indicated. [synthesis]

Part B – The psychotherapist's interventions

B1. Recognising possible candidates and making the referral

Purpose / when to use: a client with a current depressive episode who needs faster relief, or who has not tolerated or does not want medication, may ask about wake or light therapy. Some services offer chronotherapy. [source: ISAD guidelines page; SLaM protocol] [synthesis]
Steps: (1) Check what the client has read and what they want. (2) Collect history relevant to the team's screening: past hypomania or mania, psychosis, seizures, eye disease, sleep apnoea symptoms, shift work, substance use, current suicidality, recent medication changes. These mirror the published exclusions. [source: SLaM protocol] (3) With consent, write to the client's psychiatrist or GP and ask whether chronotherapy is available locally or within a trial. (4) Do not promise eligibility.
Example language (illustrative): "There's a treatment called sleep-phase advance. A specialist team moves your sleep earlier for a few days, usually after one night of staying awake. It isn't something to try at home. I can ask your psychiatrist whether it's available and whether it would suit you."
Watch for: clients planning to try it themselves. Explain that the published versions were run by teams with screening and monitoring, and that at-home attempts lose that safety net. [synthesis]

B2. Psychoeducation and support for informed consent

Purpose / when to use: before the team's consent conversation, and when the client is weighing it up afterwards. [synthesis]
Steps: (1) Explain the rationale in plain terms: the gain from a night awake often fades after sleep, and moving sleep earlier is a researched way to try to hold on to it. [source: Riemann et al. 1996; Riemann et al. 1999] (2) Give the evidence honestly: rapid effects, small studies, uncertain durability. [source: meta-analysis] (3) Name the known risks: possible relapse in the first days, tiredness, nausea, headache, a small risk of mood switching. [source: Voderholzer et al. 2003; SLaM protocol; meta-analysis] (4) Help the client list questions for the team, for example: Who supervises the nights? What happens if I feel high or much worse? Will my medication change? (5) Support the client's decision either way.
Example language (illustrative): "Some people feel better within days, but research hasn't yet shown how long that lasts. It's fine to ask the team what happens if your mood drops again in the first week."
Watch for: overvaluing the treatment out of desperation ("this will cure me"); feeling pressured to agree. Reflect both, and note the alternatives. [synthesis]

B3. Preparing for the treatment block

Purpose / when to use: in the session or two before treatment, so that daily life does not undermine adherence. [synthesis]
Steps: (1) Plan practical cover for work, childcare and transport around the hospital-based days and nights; SLaM held its sessions in hospital. [source: SLaM protocol] (2) With consent, involve a carer. Explain to them the team's instructions on staying awake and whom to call if they notice mood elevation. SLaM warned carers about mania. [source: SLaM protocol] (3) Agree on how you and the client will be in contact during the block (brief check-ins or none) and confirm this with the team. (4) Prepare the client for a possible dip and agree that they will report it rather than abandon the plan.
Example language (illustrative): "Let's work out what could get in the way of following the team's schedule next week, such as work, kids or getting to the hospital, and solve those now."
Watch for: unresolved obstacles such as night-time caring duties or shift work. SLaM excluded current night-shift workers. Raise these with the team. [source: SLaM protocol]

B4. Supporting adherence and working with ambivalence

Purpose / when to use: during the block, if the client struggles to stay awake when scheduled, naps, or wants to stop. SLaM counted naps as an adherence measure. [source: SLaM protocol]
Steps: (1) Ask about the experience without judging it. (2) Explore the ambivalence: what pulls towards continuing and what pulls towards stopping. (3) Help with coping inside the team's rules: activity, company and the planned light exposure. (4) Never advise extending, shortening or changing the schedule. Any wish to change it goes to the team the same day. [synthesis]
Example language (illustrative): "Part of you wants to give up and part of you saw that good morning after the night awake. Shall we call the team together and tell them how hard tonight feels?"
Watch for: secret naps or quietly dropping out (pass this on so the team can interpret outcomes); exhaustion that looks like a safety issue, such as driving while very sleepy. [synthesis]

B5. Monitoring and passing on warning signs

Purpose / when to use: throughout the block and for the following weeks. [synthesis]
Steps: (1) Agree on a simple daily self-rating of mood, sleep and energy, or use the team's sleep diary. SLaM used sleep diaries and actigraphy. [source: SLaM protocol] (2) Screen at each contact for hypomanic signs: reduced need for sleep with high energy, racing thoughts, unusual irritability, risky spending or behaviour. [synthesis, standard practice] (3) Ask about suicidal thinking at each contact. (4) Ask about the expected side effects: tiredness, nausea, headache, and eye strain with the light. [source: SLaM protocol] (5) Pass findings to the team the same day, and urgently for mood elevation or suicidality.
Example language (illustrative): "Since starting the new sleep times, have you felt unusually energetic, talkative or like you need much less sleep? I'd like to let the team know either way."
Watch for: a quick lift that turns into euphoria, which is not the same as recovery; relapse into low mood around days 2–5 of the advance. [source: meta-analysis; Voderholzer et al. 2003] [synthesis]

B6. Crisis and safety planning

Purpose / when to use: before starting, and whenever risk rises. Acute suicidality led to withdrawal in the SLaM protocol. [source: SLaM protocol]
Steps: (1) Update the written safety plan: warning signs, coping steps, contacts, and the team's out-of-hours number. (2) Include a plan for a sudden relapse after a rapid improvement, which can be especially discouraging. (3) Review lethal-means safety in the usual way (storage and removal). (4) Make sure the client and carer know that worsening suicidality is a reason to contact services at once, not to keep going. [synthesis, standard risk practice]
Example language (illustrative): "If you feel much better and then crash, that drop can be frightening. Let's write down exactly what you'll do and whom you'll call if it happens."
Watch for: hopelessness following an early response that has faded. [synthesis]

B7. Responding to relapse after an initial response

Purpose / when to use: if mood falls back during or after the block. [source: Voderholzer et al. 2003]
Steps: (1) Normalise it: relapse after an early response is common in the studies, and some people improve again within days. [source: Voderholzer et al. 2003] (2) Pass it on to the team, which decides any next step. (3) Use the experience therapeutically: the client has seen that their mood can shift, which is evidence against the belief that it never will. (4) Re-engage with the ongoing psychotherapy plan. [synthesis]
Example language (illustrative): "You had a few lighter days. That tells us your mood can move, even though it's dipped again. Let's take that seriously."
Watch for: self-blame, or the belief that the treatment "proved" the depression is untreatable. [synthesis]

B8. Integrating CBT-I and other psychotherapy

Purpose / when to use: for insomnia that persists after the block, and for ongoing treatment of the depression. Chronotherapy is added to usual care, which in SLaM could include behavioural activation. [source: SLaM protocol] Coordinating it with CBT-I is [synthesis]; no source describes combined protocols.
Steps: (1) Pause any CBT-I sleep-window prescriptions during the SPA block so that two schedules do not compete. (2) After the block, and once the team agrees, assess any remaining insomnia with a sleep diary and resume or start CBT-I components (stimulus control, a sleep window set by the CBT-I clinician, cognitive work on sleep worries). (3) Use behavioural activation to anchor daytime structure, such as a regular rising time agreed with the team and daylight activity. (4) In bipolar-spectrum clients, coordinate any sleep restriction with the prescriber, because shortened sleep can be destabilising. [synthesis]
Example language (illustrative): "For these few days we'll follow the team's sleep plan only. Afterwards we'll look at your sleep diary and decide together whether the insomnia work needs to restart."
Watch for: contradictory sleep messages from different clinicians; a sleep-restriction component starting too soon after the block. [synthesis]

B9. Support after the treatment ends

Purpose / when to use: in the weeks and months after the block. SLaM followed up for six months. [source: SLaM protocol]
Steps: (1) Review what helped and what was hard. (2) Support regular daily rhythms (consistent rising time, meals, activity, and the morning light exposure if the team continues it). (3) Keep relapse signatures and the action plan up to date. (4) Keep the team or GP informed of any relapse. (5) Continue evidence-based psychotherapy for the depression. [synthesis]
Example language (illustrative): "The treatment itself is over, but keeping your mornings regular is something we can keep working on together."
Watch for: a slow drift back to late, irregular sleep; returning depressive symptoms; any hypomanic signs. [synthesis]

5. Handling problems

The published sources say little about the psychotherapy around SPA. Except where a source is tagged, the responses below are [synthesis].

Client wants to do it at home. Explain that the published versions were team-run, with screening, staff support through the waking periods, and monitoring for mood switching and suicidality. [source: SLaM protocol; Riemann et al. 1999] Offer a referral instead. Do not give or improvise a schedule.
Client confuses it with treatment for being a "night owl" or for DSWPD. Separate the two: SPA is a brief depression treatment, while a persistent late body clock needs a sleep-medicine assessment and has its own guideline-based treatments. [source: AASM 2015 guideline summaries]
Rapid response, then relapse ("it didn't work"). Normalise it with the pilot data (some relapsers improved again by day 6), inform the team, and turn the episode into evidence that mood can change. Update the safety plan. [source: Voderholzer et al. 2003]
Signs of hypomania or mania. Contact the team urgently the same day, and involve the carer if the client agrees. Do not reassure the client that it is "just recovery". The switch risk is low but real, especially in bipolar disorder. [source: meta-analysis; SLaM protocol]
Rising suicidality during the block. Assess risk and act on your safety plan. Contact the team at once, because in SLaM acute suicidality was a reason for withdrawal. [source: SLaM protocol]
Non-adherence (napping, giving up on staying awake). Explore it without judgement, problem-solve inside the team's rules, and report it so the team can interpret the outcome. Never renegotiate the schedule yourself.
Overwhelm, irritability or exhaustion. Validate it. Check for safety risks such as driving or operating machinery while very sleepy. Pass on side effects (tiredness, nausea, headache). [source: SLaM protocol for expected side effects]
Rupture: the client feels you "sent them" to something that failed or felt harsh. Acknowledge it, take responsibility for your part in the referral, review together what was known beforehand (small evidence base, possible relapse), and refocus on shared goals.
Conflicting sleep advice across clinicians (CBT-I vs the chronotherapy team). Agree on one sleep plan per period: the team's plan during the block, then CBT-I afterwards with the team's agreement.
Family pressure to start or stop. Bring the carer into a joint session to explain the rationale, the risks and the client's right to decide. Signpost to the team for clinical questions.
Medication questions ("should I stop my antidepressant now that this works?"). Refer to the prescriber. Never advise changing medication. Note that in SLaM, antidepressants continued at stable doses. [source: SLaM protocol]
Client with a bipolar history pushing to be included. Pass the history on in full. Explain that some services exclude bipolar disorder and that others use chronotherapy only with specialist inpatient care and mood stabilisers. [source: SLaM protocol; meta-analysis]
Over-optimistic expectations fuelled by online claims. Attribute claims accurately: the manual's authors describe chronotherapeutics as fast and nearly free of side effects, while the meta-analysis found a small, heterogeneous evidence base with uncertain durability and under-reported side effects. [source: ISAD guidelines page; meta-analysis]

Sources

Sources:

Books and papers cited as further reading (not drawn on in full):

Wirz-Justice A, Benedetti F, Terman M (2009). Chronotherapeutics for Affective Disorders: A Clinician's Manual for Light and Wake Therapy. Basel: Karger. (Only the publisher information page is drawn on.)
Wehr TA, Wirz-Justice A, Goodwin FK et al. (1979), the original report of phase advance of the sleep-wake cycle as an antidepressant [uncertain].
Benedetti F et al. (2001), sleep phase advance and lithium in bipolar depression [uncertain: known only from the meta-analysis study list].
Wirz-Justice A, Benedetti F, Terman M and colleagues, "Chronotherapeutics: fulfilling the unmet needs for faster, better and longer-lasting antidepressant response", European Psychiatry [uncertain].
Full text of Auger et al. (2015), AASM guideline [uncertain: only the summaries listed above].

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