Short answer
Start with 2.5 mg of THC per serving and stay at or below 5 mg on your first night. Syrup is an edible, so the effect arrives in 60 to 120 minutes and can last six to eight hours. If 2.5 mg does not help you sleep after three nights, step up by 2.5 mg. Most adults land between 2.5 mg and 10 mg. Doses above 10 mg raise the chance of grogginess the next morning, and they do not improve sleep quality.
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Why syrup hits differently than a vape or a joint
Inhaled cannabis reaches the brain in minutes. Swallowed syrup passes through the stomach and liver first. That delay causes the most common mistake with edibles: taking a second dose because the first one has not kicked in. The second dose lands on top of the first, and the two peaks stack. A syrup bottle also mixes THC into liquid, so a small pour error changes the dose. Use the marked cup or syringe that came with the product, not a kitchen spoon.
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Starting dose by tolerance
- Never used cannabis: 1.25 mg to 2.5 mg THC.
- Use a few times a month: 2.5 mg THC.
- Use several times a week: 5 mg THC.
- Daily user: 5 mg to 10 mg THC, with a smaller effect from tolerance.
CBD syrups with little or no THC are a separate case. A common starting point is 10 mg to 25 mg of CBD, taken 60 minutes before bed.
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How to dose cannabis syrup for sleep
- Read the label and write down the total THC in the bottle and the THC per serving.
- Draw or pour one serving into the dosing cup.
- Take the serving 90 to 120 minutes before your target bedtime.
- Log the dose, the clock time, and your sleep quality the next morning.
- Repeat the same dose for three nights.
- Raise the dose by 2.5 mg if three nights pass with no change in sleep.
- Cap the dose at 10 mg unless a clinician tells you otherwise.
Timing and food
Take syrup on an empty stomach for a faster onset, or with a light snack for a gentler curve. A heavy, fatty meal slows absorption and shifts the peak later, which can push the strongest effect into the middle of the night.
If you take too much
Expect dry mouth, a fast heartbeat, unsteady balance, and racing thoughts. These effects are uncomfortable but not dangerous for most adults. Sit or lie down somewhere safe, drink water, and wait. Do not take more cannabis and do not drive. Symptoms ease over several hours. Call poison control or seek care if you have chest pain, severe vomiting, or trouble breathing.
When to skip syrup and see a clinician
Avoid cannabis syrup for sleep if you are pregnant, under 21, or taking sedatives, opioids, or blood thinners. Nightly use can blunt REM sleep and build tolerance, which pushes people toward higher doses. If insomnia lasts more than three weeks, or if you need a higher dose each month for the same effect, get evaluated for a sleep disorder.