Cannabis capsule dose for chemotherapy
No standard dose exists. Oral cannabis capsules vary in potency. Start with 2.5 mg THC or less. Take with food. Wait 2 hours before taking more. Increase by 2.5 mg every 2 to 3 days. Stop when nausea drops or side effects appear.
how many mg of medical cannabis capsule per day
Dronabinol (Marinol, Syndros) and nabilone (Cesamet) are FDA-approved for chemotherapy-induced nausea and vomiting. Dronabinol starting dose: 5 mg/m² before chemotherapy, then 5 mg/m² every 2 to 4 hours after, up to 4 doses per day. Nabilone: 1 to 2 mg twice daily. These are not dispensary capsules. Dispensary capsules have no FDA oversight of potency or purity.
medicinal marijuana capsule dosing guideline
Onset and duration
Oral capsules bypass the mouth and throat. They pass through the liver. First-pass metabolism removes much of the THC. Bioavailability is 4% to 20%. Onset: 30 to 120 minutes. Peak blood levels: 2 to 4 hours. Effects last 6 to 8 hours. Inhaled cannabis works in minutes. Capsules do not.
Cannabis Capsule Titration: Dosing Steps and Schedule
THC to CBD ratio
THC drives the anti-nausea effect. CBD may reduce THC side effects. Common ratios: 1:1, 2:1, 20:1. A 1:1 capsule with 2.5 mg THC and 2.5 mg CBD is a common starting point. High-THC capsules (10 mg or more) raise the risk of anxiety, dizziness, and rapid heart rate.
Titration schedule
- Day 1: 2.5 mg THC. Take at bedtime.
- Day 2-3: same dose. Note nausea and side effects.
- Day 4: if no relief, add 2.5 mg. Do not exceed 10 mg THC per day without a doctor.
- Day 7: split dose. 2.5 mg in the morning, 2.5 mg at night.
Keep a log. Record time, dose, nausea score, and side effects. Chemotherapy cycles change. A dose that works in week 1 may not work in week 3.
Drug interactions
Cannabinoids use liver enzymes CYP3A4 and CYP2C9. Many chemotherapy drugs use the same enzymes. Examples: docetaxel, paclitaxel, vincristine, irinotecan. THC and CBD can raise or lower blood levels of these drugs. Tell your oncologist about all cannabis use. Do not start capsules during an infusion week unless your doctor agrees.
Side effects and red flags
Common: drowsiness, dry mouth, dizziness, impaired balance, fast heartbeat. Rare: severe anxiety, psychosis, low blood pressure. Call your doctor for chest pain, fainting, or confusion. Do not drive after a capsule. Do not mix with alcohol or opioids.
Who should not use capsules
People with a history of psychosis, severe liver disease, or unstable heart disease. Pregnant patients. People under 25. Cannabis capsules are not a replacement for standard antiemetics. Ondansetron, dexamethasone, and aprepitant remain first-line.