Consumer Medicines Information — Cannabis for Sleep | MedWest Medical Dispensary

MedWest Medical Dispensary Where Medicine Meets Wellness.

Perth, WA

This document contains important information about your medicine. Read it carefully before you start treatment, and keep it for future reference. If you have questions, speak with your MedWest pharmacist — we're here to help.

Your Sleep. Your Medicine. Your Questions Answered.

Cannabis &
Better Sleep

A plain-language guide to help you understand how medicinal cannabis may improve your sleep, what to expect from your treatment, and how to use it safely.

1 in 5¹ Australian adults have been diagnosed with a sleep disorder by their doctor

64%² of Australian medicinal cannabis patients are using it specifically to improve their sleep

2³ key compounds in cannabis — THC and CBD — each support sleep in different ways

The two active compounds in your medicine

THC

Tetrahydrocannabinol

THC is the compound that produces the 'high' feeling. It also has a direct calming and sedating effect that can help you fall asleep more quickly.

Helps you fall asleep more quickly — most patients notice a difference within 30 minutes^3,4
May increase the amount of deep, restorative sleep you get each night³
Can reduce vivid dreams and nightmares — helpful if these are keeping you awake⁴
Works by activating receptors in the part of your brain that controls your sleep-wake cycle⁵
Particularly helpful if pain, anxiety or PTSD is what's keeping you awake^3,6

CBD

Cannabidiol

CBD won't make you feel 'high'. Instead it gently calms your nervous system, which helps address the anxiety and stress that so often prevents restful sleep.

Lowers stress hormones and anxiety — often the main reason people can't switch off at night⁷
Supports a calmer, more settled mood in the hours before bedtime⁵
At higher doses, CBD itself can have a direct calming, sleep-promoting effect^7,8
Unlike THC, CBD appears to preserve REM sleep — important for memory and emotional processing³
Can help with underlying pain or inflammation that makes it hard to stay asleep⁹

How does cannabis help you sleep?

Your Body's Own System

Your body has a built-in cannabinoid network — the ECS — that regulates sleep, pain, and mood. THC and CBD bind to its receptors (CB1 & CB2), mimicking your natural endocannabinoids.⁵

How Sleep Is Structured

Sleep naturally moves through stages — light sleep, deep sleep, and dreaming (REM). THC helps increase the deep, physically restoring stage.⁴ CBD is more flexible: a small amount can help ease anxiety before bed, while a larger dose may have a more directly calming effect.⁸

Using Both Together

Many patients find a combination of THC and CBD works best. Using them together can mean gentler, more balanced effects — CBD helps take the edge off THC and may reduce any morning grogginess. Your pharmacist can help you find the right ratio for you.^6,9

When to take it & how much to start with

When to Take It

Edibles & oils (capsules) 60–90 min before bed

Vaporised flower or oil 15–30 min before bed

CBD tinctures (under tongue) 30–60 min before bed

For best results Same time each night

How Much to Take

THC — if you're new to cannabis 2.5–5 mg

THC — with some experience 5–15 mg

CBD — gentle, daytime-safe dose 15–25 mg

CBD — higher sleep-promoting dose 50–150 mg

Start low, go slow. Always begin at the lowest suggested dose. Wait at least a week before increasing. Your MedWest pharmacist will guide you through this — it's what we're here for.

What a typical night looks like on medicinal cannabis

9:00 PM — About 90 minutes before bed

Take your edible, capsule or oil

Edibles and oils need time to be absorbed by your body — this is normal. Starting with a low THC:CBD ratio (1:1 or 1:2) is a good way to ease in gently.

10:00 PM — About 30 minutes before bed

Your natural wind-down begins

Dim your lights and put your phone away. The medicine is beginning to take effect — most patients notice reduced anxiety and a quieter mind around this time.

10:30 PM — Bedtime

Falling asleep more easily

Most patients find they drift off 10–30 minutes faster than usual. You don't need to force it — just let the medicine do its work.^3,4

During the night — Deep sleep

Deeper, more restorative sleep

THC promotes the deep sleep stage your body uses to repair tissue, strengthen your immune system and consolidate physical recovery.³

Morning — Waking up

Something to be aware of over time

With regular nightly THC use, some patients notice less dreaming over time — this is because THC can reduce REM sleep.⁴ Your pharmacist may suggest taking occasional breaks or using CBD to help balance this.⁹

Please Read — Important Safety Information

Medicinal cannabis affects everyone differently — what works well for one patient may not suit another. If you use THC regularly, your body may gradually adjust to it, meaning you might need a slightly higher dose over time for the same effect. If you stop suddenly, you may experience a brief period of more vivid dreams — this is temporary and harmless. Always start with the lowest possible dose and increase slowly only if needed. Medicinal cannabis can interact with some prescription medications, and is not recommended for people under 25, during pregnancy or breastfeeding, or for those with a personal or family history of psychosis or schizophrenia. In Australia, medicinal cannabis is only legal when prescribed by an authorised prescriber. Your MedWest pharmacist is always available to answer your questions — no question is too small.

Questions to ask your MedWest pharmacist

What ratio of THC to CBD is right for my situation?
Is my current medication affected by medicinal cannabis?
How do I know if my dose needs adjusting?
What should I do if I feel groggy in the mornings?
Can I take this if I drive to work?

📞 Call us: (08) 6256 1512 · 📍 Shop 17, 478 Wanneroo Road, Westminster WA 6061

Where this information comes from

The information in this guide is based on peer-reviewed research and current Australian clinical guidelines. The references below are provided for transparency — you don't need to read them, but they're here if you'd like to learn more.

Australian Institute of Health and Welfare. Sleep problems as a risk factor for chronic conditions. Cat. no: PHE 296. Canberra: AIHW; 2021. Available from: https://www.aihw.gov.au/reports/risk-factors/sleep-problems-as-a-risk-factor/summary
Suraev AS, Mills L, Abelev SV, Arkell TR, Lintzeris N, McGregor IS. Medical cannabis use patterns for sleep disorders in Australia: results of the cross-sectional CAMS-20 survey. Nat Sci Sleep. 2023;15:245–255. doi: 10.2147/NSS.S390583
Babson KA, Sottile J, Morabito D. Cannabis, cannabinoids, and sleep: a review of the literature. Curr Psychiatry Rep. 2017;19(4):23. doi: 10.1007/s11920-017-0775-9
Suraev AS, Grunstein RR, Marshall NS, et al. Acute effects of oral cannabinoids on sleep and high‐density EEG in insomnia: a pilot randomised controlled trial. J Sleep Res. 2025;e70124. doi: 10.1111/jsr.70124
Pacher P, Bátkai S, Kunos G. The endocannabinoid system as an emerging target of pharmacotherapy. Pharmacol Rev. 2006;58(3):389–462. doi: 10.1124/pr.58.3.2
Suraev AS, Marshall NS, Vandrey R, et al. Cannabinoid therapies in the management of sleep disorders: a systematic review of preclinical and clinical studies. Sleep Med Rev. 2020;53:101339. doi: 10.1016/j.smrv.2020.101339
Shannon S, Lewis N, Lee H, Hughes S. Cannabidiol in anxiety and sleep: a large case series. Perm J. 2019;23:18–041. doi: 10.7812/TPP/18-041
Bhatt DL, Bhatt M, Kumar R, et al. Cannabidiol for moderate–severe insomnia: a randomized controlled pilot trial of 150 mg of nightly dosing. J Clin Sleep Med. 2024;20(5):777–787. doi: 10.5664/jcsm.10998
Vaillancourt R, Gallagher S, Cameron JD, Dhalla R. Use of cannabidiol in the management of insomnia: a systematic review. Cannabis Cannabinoid Res. 2022;7(6):786–801. doi: 10.1089/can.2022.0122