How Many mg of Cannabis for Insomnia? Dosing Guide

Short answer

There is no standard milligram dose of cannabis for insomnia. Response varies by person, product, and route. For oral THC, a common starting dose is 1 to 2.5 mg. Many users settle between 2.5 and 10 mg. For oral CBD, research and clinician guides often use 25 to 75 mg, with some trials going to 150 mg. Inhaled THC doses are smaller, often 1 to 3 mg per dose. Start at the low end and wait before adjusting.

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Why the dose varies

Your body weight, liver enzymes, tolerance, and sleep problem all change the result. A dose that helps one person may cause grogginess in another. Product labels also differ. Some list THC per package, some per serving, and some per drop.

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Route changes strength and timing

• Edibles and tinctures: onset takes 30 to 120 minutes. Effects can last 6 to 8 hours.
• Inhalation: onset is within minutes. Effects fade in 2 to 4 hours.
• Topicals: little to no psychoactive effect, so they are not used for sleep.

THC and CBD act in different ways

THC binds directly to cannabinoid receptors and can make you feel sleepy. CBD may affect sleep indirectly, but human evidence is limited. A product with both may help, yet the THC amount still drives the main effect.

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Typical starting ranges for sleep

• Oral THC: 1 to 2.5 mg at first. Move up to 5 mg, then 10 mg only if needed.
• Inhaled THC: 1 to 3 mg per dose. Wait 15 minutes before taking more.
• Oral CBD: 25 to 50 mg at first. Some studies use 75 to 150 mg, but proof of benefit is weak.
• THC plus CBD: 1 to 2.5 mg THC with 10 to 25 mg CBD.

How to find your dose

1. Pick a product that lists total THC and CBD per serving, not per package.
2. Set a fixed bedtime routine and take the product at the same time each night.
3. Start with 1 to 2.5 mg THC or 25 mg CBD.
4. Wait at least two hours before taking more.
5. Keep the dose steady for three to seven nights.
6. Increase by 1 to 2.5 mg THC or 25 mg CBD if sleep does not improve and side effects are absent.
7. Stop increasing once you get a full night of sleep or feel next-day grogginess.
8. Record bedtime, wake time, and side effects in a notebook or app.

What to watch for

• Next-day drowsiness that affects driving or work.
• Dizziness, dry mouth, or a faster heart rate.
• Anxiety, paranoia, or racing thoughts.
• Tolerance, which means you need more for the same effect.
• Changes in REM sleep and dreaming.

When to talk with a clinician

Talk with a clinician before using cannabis for sleep if you take sedatives, antidepressants, blood thinners, or any drug with a grapefruit warning. Also talk with a clinician if you are pregnant, breastfeeding, under 25, or have a history of psychosis. Insomnia can stem from sleep apnea, pain, or anxiety. A clinician can check for those causes and help you set a safe dose.

Before you start

• Check that cannabis is legal in your state and that you meet the age limit.
• Buy from a licensed store that tests products for potency and contaminants.
• Keep cannabis away from children and pets.