"Start Low, Go Slow" — Universal Cannabis Dosing Principle

"Start low, go slow" is the universal clinical guidance for cannabis dosing. It applies to first-time users, to veterans returning to cannabis after decades, and to anyone using a new product type or route of administration. It is not optional advice — it is how you avoid the most common adverse experiences and it is how you figure out your individual response.

Why This Matters More for Veterans

Many veterans have prior cannabis experience from decades ago — in the military, after service, or during periods of illegal use. This creates a specific risk: the assumption that past experience predicts current response. It does not, for several reasons:

• Modern cannabis is 3–5x more potent. Flower in the 1970s averaged 1–5% THC. Modern dispensary flower averages 15–25% THC.
• Concentrates didn't exist. Dabs, shatter, wax, and live resin (60–90% THC) were not available in the 20th century.
• Edibles are dramatically stronger. Modern edibles are professionally dosed with measured THC; brownies in 1975 were variable and usually low-dose.
• Individual tolerance fades. Even a veteran who used daily in 1975 has almost certainly lost tolerance. First-time exposure at modern potencies is effectively a new experience.
• Age-related pharmacokinetic changes. Older adults metabolize cannabis differently than younger adults, with longer half-lives and sometimes more pronounced effects.
• Medication interactions. Older veterans are typically on more medications, increasing interaction risk.

Onset Times by Route

Different routes of administration have different onset and duration profiles. Knowing the onset time prevents the single most common overdose pattern: taking more because you cannot feel the first dose, then having all doses hit at once.

Starting Doses by Route

The following starting doses are appropriate for veterans who have not used cannabis recently (or ever):

Inhaled (Flower or Vape)

• Start with a single puff. One small inhalation, held briefly, then exhaled normally.
• Wait at least 15 minutes before taking another puff
• Aim for flower at 15% THC or lower on your first experience
• For vape cartridges, start with a single short draw (1–2 seconds)

Edibles

• Start with 2.5mg THC or less. This is a quarter of a standard 10mg serving.
• Wait at least 2 full hours before taking more. If the dose feels mild at 90 minutes, it will still be climbing at 120 minutes.
• If you need more, take another 2.5mg and wait another 2 hours
• Stay home. Do not drive. Make sure you have nothing important to do.
• Have food, water, and a place to rest available

Tinctures

• Start with 2.5–5mg THC under the tongue
• Wait at least 60 minutes before more

Topicals

Topicals are generally low-risk because they do not produce systemic psychoactivity at typical doses. The main caution is avoiding high-THC products near mucous membranes or broken skin, which can produce unintended systemic effects.

Titrating Upward

Once you have experience with a low starting dose, you can gradually increase if needed. The pattern is:

1. Establish your baseline response to a low dose over 2–3 sessions
2. Increase the dose by a small increment (e.g., from 2.5mg to 5mg edible, or from one puff to two)
3. Wait at least one full session before increasing again
4. Stop increasing when you reach the desired effect, not when you run out of product

If You Take Too Much

CBD may help reduce acute cannabis anxiety in some people. Some experienced cannabis users keep CBD isolate on hand specifically for this purpose, though the evidence for "CBD rescue" is largely anecdotal.

Special Considerations

If You Are on Multiple Medications

Start even lower than the guidance above. Cannabis may interact with your medications, and starting low minimizes the chance that an interaction produces unexpected effects. Tell your VA provider. See drug interactions.

If You Have Heart Disease

Cannabis acutely raises heart rate and blood pressure. Veterans with coronary artery disease, heart failure, or significant arrhythmia should discuss with their cardiologist before any cannabis use and should consider CBD-dominant products over THC-dominant products.

If You Have TBI

Cognitive effects of cannabis can compound TBI symptoms. Start very low and be willing to stop entirely if cannabis worsens post-concussive symptoms. TBI page.

If You Have PTSD

High-dose THC can trigger anxiety and panic, which is particularly unpleasant for veterans with PTSD. Start with a very low dose in a calm, controlled environment with someone you trust nearby. If you experience anxiety, stop and reassess before using again.

Why This Principle Is Universal

"Start low, go slow" applies to:

• First-time users
• Veterans returning after a long break
• Anyone trying a new product type (e.g., first edible after years of flower use)
• Anyone trying a new concentration or potency
• Anyone starting a new medication that might interact with cannabis
• Older adults, regardless of prior experience

Experienced daily users have built tolerance to cannabis, but even they should start low when trying a new product type or after a break. Tolerance is route-specific — heavy flower users can still have a bad experience with edibles if they assume their flower tolerance applies.

Related Reading

• Dispensary Basics
• Drug Interactions
• Lower-Risk Use Guidelines
• Cannabis & Anxiety (Biphasic Problem)