Melatonin is a clock-setting tool more than a sleeping pill: use it for shift work, travel and circadian problems, taken hours before the intended bedtime. Low doses are enough, and product quality matters.
When we reach for it
We mostly use it to regulate the sleep-wake cycle: shift work, international travel, and people with a bad circadian rhythm for endogenous or behavioral reasons. When the problem is circadian rather than insomnia, go for melatonin and a bright light regimen.
“I mostly use it for sleep-wake cycle regulation. For example, shift work, international travel, and people who have a bad circadian rhythm for either endogenous or behavioral reasons, basically”
45:53Sleep Medications Treatment Tier List: Best Insomnia Medications RankedAug 2026 Also said in 1 more episode
“You're dealing with a circadian disorder rather than an insomnia. Not that we have insomnia defined well. There, you should be going more for melatonin and bright light regimen”
1:01:21Insomnia and Sleep Medications in PsychiatryDec 2024
Dosing and timing
It has a double effect, shifting the sleep clock and sedating. To move the clock, give it earlier than you would think, several hours before the intended bedtime.
“And melatonin, in that case, you got to remember, has double effect, right? It has an effect on sort of regulating the sleep clock and also has a sedative effect. You may want to be using it earlier than you'd think several hours before the intended bedtime”
1:02:00Insomnia and Sleep Medications in PsychiatryDec 2024 Patients often take far higher doses than they should. Studies suggest 0.3 to 1 mg is the ideal dose.
“Oftentimes patients use it at way higher doses than they should be. I think studies have shown like 0.3 to 1 milligrams is the ideal dose”
46:57Sleep Medications Treatment Tier List: Best Insomnia Medications RankedAug 2026
Pitfalls
Ask patients to use a product approved by the pharmaceutical testing board. Nature Made or the Costco brand are usually the easiest to find.
“I just ask patients to use ones that have been Approved by like that pharmaceutical testing board at least. So that's basically nature made or like Costco brand is usually the easiest to find”
47:50Sleep Medications Treatment Tier List: Best Insomnia Medications RankedAug 2026
Pearls
Caffeine and melatonin are both metabolized by CYP1A2, so it is possible they compete there.
“it is possible that it could be competitive use. I believe of cytochrome 1A2 because both caffeine and melatonin are metabolized by 1A2”
53:00Sleep Medications Treatment Tier List: Best Insomnia Medications RankedAug 2026 Light suppresses the body's own melatonin. People kept up all night doing paper-and-pencil tests in a lit room had no rise in melatonin at all, and even a little light, more than about three candles' worth, is enough to suppress it. Wearing amber lenses through the same all-nighter, their melatonin went up when it was supposed to: if blue light sets the rhythm, the absence of blue light is physiologic darkness, even while awake.
“when they are invited to stay up all night and do paper and pencil tests all night in a lit environment, their melatonin never goes up at all. You've suppressed it. Even a little bit of light, more than the three candles, is enough to suppress your melatonin”
34:04How to Stabilize Mood without Medications: Social Rhythm Therapy Anyone Can Use with Dr. Jim PhelpsNov 2026Guest episode Also said in 2 more episodes
“When they wore the amber lenses, stayed up all night, just like before, paper and pencil tests all night, their melatonin went up when it was supposed to. They were in physiologic darkness, even though they were awake”
35:06How to Stabilize Mood without Medications: Social Rhythm Therapy Anyone Can Use with Dr. Jim PhelpsNov 2026Guest episode “So if it's blue light that sets your circadian rhythm, then the absence of blue light is physiologic darkness”
33:43How to Stabilize Mood without Medications: Social Rhythm Therapy Anyone Can Use with Dr. Jim PhelpsNov 2026Guest episode
It also comes up on
- AntipsychoticsIn the ICU or nursing home, controlling the sleep-wake cycle with trazodone, mirtazapine, melatonin or ramelteon may give a lot of the same effect without the same problems.
- DementiaIn the nursing home or ICU patient, controlling the sleep-wake cycle with something like trazodone, mirtazapine, melatonin or ramelteon may give a lot of the same effect without the same problems.
- HydroxyzineHydroxyzine, trazodone and gabapentin are the broadly applicable sleep medications for most to all disorders, with melatonin as a runner-up.
- InsomniaIn the ICU or nursing home, controlling the sleep-wake cycle with trazodone, mirtazapine, melatonin or ramelteon may give a lot of the same effect without the same problems.
From these episodes
- How to Stabilize Mood without Medications: Social Rhythm Therapy Anyone Can Use with Dr. Jim PhelpsNov 2026 · 3 points
- Sleep Medications Treatment Tier List: Best Insomnia Medications RankedAug 2026 · 4 points
- Insomnia and Sleep Medications in PsychiatryDec 2024 · 2 points
Every point above is something said on the Psychofarm podcast, with the words as spoken and a link to the moment in the episode. It is education, not medical advice, and an episode reflects what we thought when we recorded it.