The guide
Cannabis, explained without the mystique
Six short chapters covering what the compounds do, how each format behaves, how to pick a starting dose, how to stay safe, what the law generally requires, and what to ask at the counter.
Chapter one
Cannabinoids: the active compounds
Cannabis produces more than a hundred compounds called cannabinoids. A handful do most of the work you'll notice, and dispensary labels usually report only the first two.
| Compound | What it generally does | Intoxicating? |
|---|---|---|
| THC Delta-9-tetrahydrocannabinol | The primary source of the "high" — euphoria, altered time sense, appetite, and at higher doses anxiety or a racing heart. | Yes |
| CBD Cannabidiol | Non-intoxicating. Often described as calming; frequently used to soften the edge of THC in a blended product. | No |
| CBN Cannabinol | Forms as THC ages. Marketed heavily for sleep, though the evidence for that on its own is thin. | Mildly |
| CBG Cannabigerol | The precursor other cannabinoids are built from. Non-intoxicating; research is early. | No |
| THCV Tetrahydrocannabivarin | Present in small amounts. Reported as clear-headed and appetite-suppressing at low doses. | Dose-dependent |
What the percentage actually tells you
A flower label saying 28% THC means roughly 280 mg of THC per gram — it tells you about potency per puff, not about quality, flavour, or how the product will make you feel. High-THC flower consumed carelessly is the most common route to an unpleasant first experience. Many experienced users deliberately buy in the 15–20% range because the effect is more manageable and the terpene profile is often better.
Edibles are labelled in milligrams, not percentages. A single gummy is commonly 5 or 10 mg of THC. Read the per piece number, not the package total.
Chapter two
Terpenes: why the same THC feels different
Terpenes are the aromatic oils that give a cultivar its smell — citrus, pine, diesel, lavender. They are the reason "indica" and "sativa" are poor predictors of effect, and increasingly the reason experienced buyers ask to smell the jar before committing.
Myrcene
Earthy, musky, ripe mango. The most common terpene in cannabis; associated with heavy, sedating profiles.
Limonene
Bright citrus peel. Associated with elevated, energetic, mood-lifting profiles.
Pinene
Pine needles and rosemary. Associated with alertness and clearer-headed effects.
Linalool
Lavender, floral. Associated with calm, relaxed, wind-down profiles.
Caryophyllene
Black pepper, clove. Unusual in that it binds cannabinoid receptors directly.
Terpinolene
Apple, herbs, fresh wood. Common in cultivars people describe as bright and buzzy.
Terpene research is still young. Treat these as tendencies people report, not pharmacology you can bank on. The most reliable predictor of how a product will treat you is still your own record of what you have tried.
Chapter three
Ways to consume, and how long each one owns your day
Format matters more than most first-time buyers expect. The difference between a vape and a gummy is not intensity — it is how fast it arrives and how long you are committed to it.
| Format | Onset | Peak | Typical duration | Notes |
|---|---|---|---|---|
| Flower (smoked) | Seconds–10 min | 15–30 min | 2–4 hours | Fast feedback makes it easy to stop at the right point. Combustion irritates the lungs. |
| Vaporiser | Seconds–10 min | 15–30 min | 2–4 hours | Same speed as smoking, less combustion. Buy cartridges only from licensed shops. |
| Edibles | 30 min–2 hours | 2–4 hours | 4–12 hours | The classic mistake: redosing at 45 minutes because "nothing happened". Don't. |
| Tincture (under tongue) | 15–45 min | 1–2 hours | 2–6 hours | Held sublingually it absorbs faster than a swallowed edible and is easy to measure. |
| Topicals | 15–30 min | — | 2–4 hours | Applied to skin. Generally non-intoxicating; used for localised discomfort. |
| Concentrates / dabs | Immediate | 5–15 min | 1–3 hours | Very high potency. Not a beginner product under any circumstances. |
Times vary widely with body weight, metabolism, tolerance, and whether you have eaten. Take the longest number in each row seriously when you plan your evening.
Chapter four
Dosing: start low, go slow
This is the single piece of advice that prevents the majority of bad experiences. Milligrams of THC, for someone with little or no tolerance:
| Dose | Who it suits | What to expect |
|---|---|---|
| 1–2.5 mg | First time, ever | Mild relief and light mood change. Many people feel very little — that is the correct outcome for a first attempt. |
| 2.5–5 mg | Occasional users | Clear euphoria, altered perception, impaired coordination and short-term memory. |
| 5–10 mg | Regular users | Strong effects. For an inexperienced person, 10 mg is frequently too much. |
| 10 mg+ | High tolerance only | Significant impairment. Not a dose to explore socially or in public. |
The rules that matter
Wait two full hours before taking more of an edible. One variable at a time — don't try a new product and a new dose on the same night. Eat first. Write down what you took; after three or four entries you will know your own dose better than any budtender can guess it.
If you take too much: it is frightening but not life-threatening. Move somewhere quiet and cool, sit or lie down, drink water, and let it pass — inhaled effects fade within a few hours, edibles take longer. Get medical help if there is chest pain, persistent vomiting, or the person cannot be roused.
Chapter five
Safety basics
Never drive
Cannabis impairs reaction time, tracking and judgement of distance. Impairment outlasts the obvious high, and edibles can impair you the next morning. Driving under the influence is a criminal offence in every state that has legalised.
Don't stack it with alcohol
Alcohol increases THC absorption. The combination is a far more common cause of a night ending badly than cannabis on its own.
Check your medications
Cannabis interacts with blood thinners, sedatives, some antidepressants and more. Ask a pharmacist — the conversation is confidential and they will not judge you.
Lock it up
Edibles look like candy. Store everything in a locked or high cabinet, in the original labelled packaging, away from children and pets. Chocolate edibles are doubly dangerous to dogs.
Know your own risk
If you are pregnant or breastfeeding, or have a personal or family history of psychosis or schizophrenia, the safest choice is not to use cannabis. Talk to a clinician.
Watch the creep
Tolerance builds fast with daily use, and heavy long-term use can lead to dependence. A regular break resets both. If use has stopped feeling like a choice, that is worth raising with a professional.
Nothing on this page is medical advice, and it can't account for your health history or medications. Talk to a qualified clinician about your own situation.
Chapter six
The law, in broad strokes
Cannabis law in the United States is state-by-state and changes often. Rather than repeat numbers that go stale, here is the shape of it — then check your own state before you buy.
- Cannabis remains federally controlled, even where a state has legalised it. That is why dispensaries are cash-heavy and why federal property and federal employment are separate questions entirely.
- Adult-use purchase is 21+ everywhere it is legal, and you will be carded at the door. Medical programmes may allow qualifying patients under 21.
- Possession limits are real and specific — usually expressed in ounces of flower and grams of concentrate, with separate limits for what you may hold at home.
- Do not cross state lines with it. Transporting cannabis between states — even two legal ones — is a federal offence, and airports are federal jurisdiction.
- Public consumption is generally prohibited, including in a parked car. Consumption lounges exist in some places and are licensed separately.
- Employment protections vary widely. Legal use is not automatic protection from a workplace drug policy. Check your employer's rules and your state's law.
- Buy licensed. Licensed retailers carry lab-tested product with a certificate of analysis. Unlicensed vape cartridges in particular have caused serious harm.
This is general information, not legal advice. Verify current rules with your state's cannabis control agency before you purchase or travel.
Bonus chapter
Your first visit to a dispensary
Bring a government-issued photo ID and, in most places, cash — many shops still can't take credit cards, and the ATM inside charges for the privilege. Expect to be checked in at a front desk before you reach the retail floor.
Five questions worth asking the budtender
- "I'm new / it's been years. What would you start me on?" — the single most useful sentence in the shop.
- "What's the lowest-dose edible you carry?"
- "Can I see the certificate of analysis for this?" — a licensed shop will have it.
- "What are the dominant terpenes on this one?" — a better question than indica vs. sativa.
- "When did this come in?" — freshness materially affects flower.
Tipping is customary where it is permitted. And you are allowed to leave without buying anything — a good shop would rather you come back informed.