Medical Cannabis Dosage Guide: Start Low and Go Slow | Pop's Cannabis

There is no standard medical cannabis dose. A workable starting point for most people new to oral products is 1 to 2.5 mg of THC per dose, taken once, then waiting at least 1 to 2 hours before deciding whether to take more. Inhaled cannabis acts in minutes, so one small puff and a 15 minute wait works better there. The rest is adjustment. I keep the advice simple: start low, go slow, and write it down.

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Why one dose does not fit everyone

Your liver enzymes, body weight, age, prior cannabis use, and the condition you are treating all change how a dose lands. THC also has a biphasic effect. A small amount may ease nausea or pain while a larger amount can trigger anxiety, racing thoughts, or a fast heartbeat. That is why a dose that helps one person can overwhelm another.

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Starting amounts by route

Oral products (edibles, capsules)

• New users: 1 to 2.5 mg THC
• Onset: 30 to 120 minutes, with peak effects at 2 to 4 hours
• Wait at least 2 hours before a second dose. The liver converts THC to 11-hydroxy-THC, which can feel stronger than inhaled THC.

Sublingual oils and sprays

• Start at 1 to 2.5 mg THC, held under the tongue for 60 to 90 seconds
• Onset: 15 to 45 minutes

Inhaled (flower or vape)

• Take one 2 to 3 second puff, then wait 10 to 15 minutes
• Easy to titrate, harder to measure exact milligrams

Topicals

Topicals produce little to no psychoactive effect. Dose by coverage of the painful area, not by milligrams.

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THC and CBD dose on different scales

CBD often starts at 5 to 25 mg per day, and some patients go higher with medical supervision. CBD can raise blood levels of drugs such as warfarin and clobazam by tying up liver enzymes. Balanced products, like a 1:1 or 2:1 CBD to THC ratio, give you CBD with less THC effect.

Keep a dose log

1. Date and time
2. Product name and batch
3. THC mg, CBD mg, and route
4. Relief score from 1 to 10
5. Side effects such as dry mouth, drowsiness, anxiety, or a fast heartbeat
6. How long the effects lasted

Patterns show up after a week or two. Then you can adjust one variable at a time instead of guessing.

Signs to stop and call a clinician

Chest pain, a rapid heartbeat, severe panic, confusion, or vomiting that will not stop need medical attention. Cannabis hyperemesis syndrome causes repeated vomiting and belly pain, and it does not improve by taking more cannabis. Do not drive after inhaling or during the first hours of an edible. Mixing cannabis with alcohol, opioids, or benzodiazepines raises the risk of harm.

What to ask your doctor or pharmacist

Bring product labels that list THC and CBD milligrams per serving. Ask about interactions with your current prescriptions, your heart health, any history of psychosis, and pregnancy. Some people do better starting with a CBD-dominant product and adding THC later. This guide is general information, not a prescription.