Cannabis dosage: what to discuss with your practitioner
Your treatment instructions should come from the practitioner responsible for your care. Weight, experience and a symptom alone cannot establish a suitable dose.
This page provides general information and does not calculate or recommend a personal dose. Follow your prescription and ask your practitioner before changing the amount or product.
Bring the product label to your consultation
- Check the named ingredients and the THC and CBD amounts on the label.
- Grams of flower, millilitres of oil and milligrams of THC describe different things. An oil volume without its concentration does not tell you the amount of THC or CBD.
- Ask your practitioner or dispensing professional to explain the prescribed amount, route, timing and what to do if you miss a dose.
Prepare for an individual review
- Bring your prescription, product packaging and a list of medicines, supplements and allergies.
- Describe your symptoms, previous reactions and relevant medical or mental-health history. Tell the practitioner if you are pregnant or breastfeeding.
- Ask when to seek help, how follow-up works and whether other treatment may be more appropriate.
Understand the risks
- Cannabis can impair attention, coordination and judgment. Do not drive or operate machinery after use.
- Effects vary by product and how it is taken. Edible effects can be delayed; taking more before the effects develop can increase the risk of harm.
- Alcohol and other substances can increase impairment. Discuss medicine interactions with your practitioner.
- Keep cannabis products secure and out of reach of children and pets.
Need help understanding your treatment?
Request a medical review to discuss your symptoms, medicines and treatment options. A prescription depends on the practitioner’s assessment.
Start consultationSources and further reading
Sources checked: 7 October 2026. General education; individual medical advice requires a practitioner.