Why someone would choose Methadone / Methadose over Kadian?

1. Methadone is first-line. Kadian is third-line.

Methadone has a large, decades-long evidence base for OUD. Kadian/SROM is only used when buprenorphine and methadone have failed or can’t be tolerated. Most clinicians will not offer Kadian unless those first two treatments were unsuccessful.

2. Predictable, strong “holding” for most heavy users

Methadone is extremely effective at:

• suppressing withdrawal

• blocking cravings

• blocking illicit opioid reinforcement

• It “holds” more reliably than SROM for people using fentanyl or very high-tolerance opioids.

3. Flexible dose titration

Methadone can be adjusted daily or every few days, in small increments. Kadian cannot be fine-tuned this easily — dose jumps are larger and physiologic response can vary.

This matters for people who are unstable or need careful control during early stabilization.

4. Longer half-life, smoother coverage

Methadone provides very consistent 24-hour coverage once stabilized. Kadian’s pharmacokinetics are more variable — some people feel mild withdrawal before the next dose, especially early on.

5. More research, clearer protocols

Methadone has standardized dosing manuals, long-term outcome data, and clear titration and safety rules. Kadian has less research, especially in fentanyl-era OUD.

Clinicians choose the treatment with the known, predictable outcomes first.

6. Better at retaining people in treatment

OAT retention is a major predictor of reduced mortality. Methadone has proven high retention, especially for people who can’t stabilize on buprenorphine.

Kadian’s retention data is positive but limited and inconsistent.

7. Cost and coverage

Methadone is inexpensive and universally covered across Canada. Kadian is covered but considered a specialized therapy — some provinces add administrative barriers because it’s not first-line.

8. Safety / supervision structure

Methadone programs are designed for OUD:

• observed dosing

• gradual take-home privileges

• toxicology monitoring

Kadian is still “pain-medicine” morphine used off-label for OUD, so protocols vary across clinics, and some prescribers aren’t comfortable using it.

9. Clinical comfort

Almost every OAT prescriber is deeply familiar with methadone. Far fewer have experience managing Kadian for OUD. Comfort → safer, more consistent care.

Short version you can use with clients

“Methadone is the standard full-agonist treatment. It holds people more consistently, has decades of data behind it, and can be titrated precisely. Kadian is only used when methadone and bupe don’t work or can’t be tolerated. That’s why Methadose comes first.”