The right dose of medical cannabis is the lowest amount that eases your symptoms with side effects you can tolerate. For most adults new to THC, that means starting at 1 to 2.5 mg per dose and increasing in small steps. No universal number exists because weight, tolerance, condition, product ratio, and route of administration all change how cannabis behaves in the body.

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What is a typical starting dose of THC?

Clinical guidance from major health systems uses a start low, go slow model rather than fixed milligrams. A first oral dose of 1 to 2.5 mg THC is common, taken when you can rest and observe the effects.

THC Dosage Chart for Medical Patients: Start Low, Go Slow

Recreational edibles often sell 10 mg THC as one serving. Treat that figure as a ceiling for experienced users, not a target for beginners.

Cannabis Edibles Dosage Chart: Milligrams by Experience Level

Why is there no single correct dose?

Cannabis does not dose like most prescription drugs because absorption varies from person to person and product to product. The same milligram amount of oral THC can feel mild to one patient and overwhelming to another.

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Tolerance also builds with regular use, so a dose that worked in month one may feel weak by month three. The National Academies review of cannabis research found dose-dependent effects for chronic pain, nausea, and spasticity, which supports ranges rather than one universal number.

How does the route of administration change dosing?

Inhaled cannabis reaches the bloodstream within minutes and peaks in 15 to 30 minutes, so effects are short and titration is fast. Edibles can take 30 to 120 minutes to onset and last 6 to 8 hours or longer, which makes early redosing the most common cause of a bad experience.

What role do CBD to THC ratios play?

CBD can blunt THC side effects such as anxiety and a racing heart, so a 1:1 or 2:1 CBD to THC product is often easier to tolerate than THC alone. CBD carries its own dose range, with 10 to 50 mg per day studied in epilepsy and lower amounts studied for anxiety.

A balanced ratio lets new patients raise THC in small steps without overshooting. People managing severe pain or spasticity may shift toward THC-dominant products once tolerance is established.

How do you titrate medical cannabis safely?

  1. Choose one product and one route, and note the milligrams of THC and CBD per dose.
  2. Start at the low end, usually 1 to 2.5 mg THC.
  3. Wait two full hours for edibles, or 15 minutes for inhaled, before judging the effect.
  4. Increase by 1 to 2.5 mg only after two to three days at the same dose.
  5. Stop raising the dose once symptoms improve or side effects appear.
  6. Log dose, time, symptoms, and side effects, then review the log with your clinician.

Who needs a lower starting dose?

Older adults, first-time users, and anyone taking benzodiazepines, opioids, or blood thinners should start lower and move slower. Cannabis can interact with sedatives and raise heart rate, so medical supervision matters when other drugs are in the mix.

Pregnancy, breastfeeding, and a personal history of psychosis are situations where cannabis is not advised at any dose.

Can a clinician set your dose?

Yes. In states with medical programs, a recommending physician or dispensary pharmacist can build a plan around your condition, cannabis history, and current medications. Bring your symptom log to follow-ups so the plan changes based on your data instead of guesswork.