The bedtime dose window is the planned time band within which a compound is taken in relation to target lights-out, chosen so the compound reaches peak effect when sleep pressure is rising rather than after wake the next day. A 30–60 minute shift inside this window routinely turns a helpful sleep aid into a groggy-morning problem or an early-morning wake, which is why the window is tracked as its own field rather than folded into a generic "evening" label.
Why the band matters more than the clock
Sleep-active compounds follow fast pharmacokinetics relative to the 7–9 hour sleep block they modulate. Melatonin at 0.3–1 mg peaks in plasma within 30–60 minutes and clears within 3–5 hours, so a dose taken 2 hours before lights-out may have mostly cleared before the deepest sleep cycles. Magnesium glycinate 200–400 mg builds more slowly and is less time-sensitive. Apigenin or glycine sit in between. The band is drawn around the compound's onset, not around the user's vague sense of "evening," and is a direct application of dose windows to the sleep block.
Typical windows by compound class
| Compound | Window before target lights-out | Notes |
|---|---|---|
| Melatonin (0.3–1 mg) | 30–60 minutes | Lower doses are easier to dial in; dose above 1 mg often backfires |
| Magnesium glycinate | 60–120 minutes | Lower time sensitivity; take with a small carbohydrate |
| Glycine (3 g) | 60 minutes | Mild temperature drop effect tied to sleep onset |
| L-theanine (200 mg) | 30–45 minutes | Works well paired with magnesium |
| Apigenin or chamomile | 45–60 minutes | Effect is mild; consistency matters more than minute precision |
| Last caffeine of the day | 8–10 hours before lights-out | Half-life of 5–6 hours means a 3 pm dose still affects 11 pm sleep |
| Large protein or fatty meal | 3 hours before lights-out | Digestive load delays sleep onset and reduces efficiency |
A user targeting 11 pm lights-out with a melatonin protocol therefore takes 0.3 mg at 10:15 pm, not 8 pm, and locks that window for at least 7–10 nights before judging the effect.
Compounds that belong outside the window
Anything with a stimulant arc crowds sleep even at low dose. Examples that should sit 6 or more hours before lights-out:
- Caffeine in any form, including pre-workout, green tea extract, or chocolate-heavy snacks.
- Rhodiola and panax ginseng in their typical morning doses.
- High-dose B-complex and B12 formulas.
- Tyrosine, phenylalanine, and most amino stimulants.
- Pre-workout formulas taken after a late training session, which should be tapered down or replaced with a caffeine-free pre on evening days.
If a user suspects an evening compound is disrupting sleep, move it 6 or more hours earlier and run 2 full nights with no other changes to confirm.
Shift work and travel adjustments
The window is drawn around the user's actual sleep block, not the local clock. A 9 am-to-5 pm shift sleeper should plan the bedtime window relative to their 9 am lights-out, exactly as a typical night sleeper plans to an 11 pm lights-out. Across time zones, a 30–60 minute shift per day keeps logs interpretable. Logging each transition as a tag lets baseline establishment and the trend view discount the transition nights rather than treat them as part of the trend.
Common failure patterns
Three patterns produce most "my sleep aid stopped working" reports:
- The dose is correct but the window drifts by more than 60 minutes night to night, so the body never receives a consistent signal.
- An evening-stacked caffeine or pre-workout sits inside the clearance window of the sleep aid and wins the pharmacologic tug of war.
- The dose of melatonin is above 1 mg, which overshoots and produces next-day grogginess that the user then blames on the protocol.
How this appears in Unfair
Unfair sets a bedtime dose window on every sleep-tagged entry and nudges reminders inside that band rather than at a single fixed time. The overlap view flags caffeine or stimulant entries whose predicted clearance still sits inside the bedtime window, and the trend chart separates nights where the window held from nights where it drifted by more than 45 minutes, so effect estimates stay honest.
Clinical safety note
Persistent insomnia, palpitations, severe anxiety, confusion, or paradoxical agitation after an evening dose is a stop-and-call signal, not a dose-adjustment signal. Patients on benzodiazepines, Z-drugs, sedating antidepressants, or antipsychotics should involve their prescribing clinician before adding anything to the bedtime window, since additive sedation and next-day impairment risks are real.