The short answer
Buy from a licensed dispensary. Take one puff of 2 to 3 seconds. Wait 15 minutes before a second puff. Two puffs are enough for a first session.
are thc vapes legal in my state
A 1 gram cartridge at 80% THC holds about 800 mg of THC. Across 200 to 300 puffs, that works out to 1 to 4 mg per puff. Labels do not print a per puff number because puff size varies. Treat each puff as a dose and count puffs.
THC Vape Reviews: Convenience vs. Quality in Cannabis
Onset and duration
Inhaled THC reaches the blood in seconds. Effects appear in 5 to 10 minutes. Peak hits at 15 to 30 minutes. Effects fade over 1 to 3 hours. Edibles take 30 to 120 minutes and last longer. A beginner who judges a vape dose by edible timing will take too much.
Hardware types
- 510-thread cartridge: screws onto a separate battery. Common sizes are 0.5 g and 1 g. Most batteries have adjustable voltage.
- Pod system: brand-specific, closed, no voltage control. Sold with a matching battery.
- Disposable: battery and oil in one sealed unit. No charging, no refill. Discard when empty.
Voltage sets heat. 2.5 to 3.3 volts vaporizes oil at a lower temperature and keeps terpenes. Settings above 4 volts scorch the coil and give a harsh hit. Most batteries ship at 3.3 volts. A preheat cycle clears a clogged mouthpiece.
Legal status
Federal law lists THC as a Schedule I controlled substance. Possession and sale are federal crimes, including in states with legal cannabis. As of 2025, 24 states and the District of Columbia allow adult recreational cannabis. Retail timelines differ by state. Keep a product inside the state where you bought it. Crossing a state line with it is a federal offense.
Recreational purchase requires age 21. Some state medical programs allow age 18 with a doctor's certification. Dispensaries check photo ID at the door.
Sourcing and safety record
The 2019 to 2020 EVALI outbreak caused 2,807 hospitalizations and 68 deaths in the US, per CDC. Vitamin E acetate showed up in 48 of 51 lung fluid samples that CDC tested from EVALI patients. Vitamin E acetate is a thickener found in illicit cartridges. Licensed products carry state testing for pesticides, heavy metals, and residual solvents. Unlicensed carts carry no test report.
Short term effects include dry mouth, red eyes, fast heart rate, anxiety, and impaired coordination. Risk rises with THC percentage. Cannabis use before age 25 may affect brain development, per NIDA. People with heart disease or a history of psychosis should consult a doctor.
Convenience and its cost
A cartridge needs no grinder, no lighter, and no rolling paper. Odor is lower than flower smoke. That ease is a main reason carts hold a large share of legal cannabis sales. The tradeoff is dose control. Flower lets a user see the amount. A vape hides it behind a button. Log puff counts to keep a dose repeatable.
Storage
Store cartridges upright at room temperature, away from sunlight. Heat above 80 F thins the oil and causes leaks. Oil color runs from pale yellow to amber. Dark oil is older or oxidized. Keep the rubber caps for travel, and keep the cart away from keys and coins that press the button.