Marijuana can be taken in several different ways, and the method you choose significantly affects how quickly it works, how strong the effects feel, and how long they last. The main routes are inhalation (smoking or vaping), oral ingestion (edibles and capsules), sublingual absorption (tinctures held under the tongue), topical application, and suppositories. Each method delivers THC to your body through a different pathway, which changes the entire experience.
Smoking and Vaping
Inhalation is the most common and fastest-acting method. When you smoke or vape cannabis, the active compounds pass from your lungs directly into your bloodstream. Effects can be felt within seconds to minutes, with peak levels reached in about 6 to 10 minutes. This rapid onset makes it easier to gauge how much you’ve consumed and adjust accordingly.
Smoking involves combustion, whether through a joint, pipe, or water pipe (bong). Long-term smoking is substantially associated with increased cough, phlegm, wheezing, and more frequent episodes of chronic bronchitis. Burning cannabis also produces toxic byproducts, including carcinogenic compounds, benzene, toluene, and carbon monoxide.
Vaporizers heat cannabis to a lower temperature, typically between 325°F and 430°F (163–221°C), which releases cannabinoids without burning the plant material. This avoids many of the harmful combustion byproducts. One cross-sectional study found that vaporizer users were 40% less likely to report respiratory symptoms like cough, phlegm, and chest tightness compared to smokers, even after accounting for the amount of cannabis consumed. A small trial also found that smokers who switched to vaping for 30 days experienced significantly improved respiratory symptoms and lung function.
That said, vaping carries its own risks. During the 2019 EVALI outbreak (a wave of vaping-related lung injuries tracked by the CDC), 73% of cases reported using THC-containing vaping products. The culprit was largely tied to unregulated cartridges containing additives, not to regulated cannabis flower vaporizers, but the episode highlighted the importance of product source and quality.
When inhaled, THC has an average bioavailability of about 30%, meaning roughly a third of the THC in the product actually reaches your bloodstream.
Dabbing and Concentrates
Dabbing is a form of inhalation that uses cannabis concentrates, including wax, shatter, and resin, instead of dried flower. These products contain around 80% THC, compared to roughly 15–25% in typical flower. A small amount of concentrate is placed on a heated surface and the resulting vapor is inhaled.
The onset is essentially the same as smoking or vaping (seconds to minutes), but the intensity is much higher due to the concentration of THC. Heating concentrates above 600°F can produce harmful compounds as the extract begins to burn, so lower-temperature dabbing is generally preferred.
Edibles and Capsules
Edibles include gummies, baked goods, chocolates, beverages, and capsules. When you swallow cannabis, it travels through your digestive system to the liver before its active compounds enter your bloodstream. Most people start feeling effects around the 45-minute mark, though the full range is anywhere from 30 minutes to 2 hours depending on your metabolism, what you’ve eaten, and the product itself.
The liver converts THC into a different psychoactive compound that can produce stronger or longer-lasting effects than inhaled THC. This is one reason edibles often feel more intense per milligram than smoking. However, the trade-off is efficiency: oral THC has a bioavailability of only 4% to 12%, meaning your body absorbs a much smaller fraction of what you consume. Absorption is also highly variable from person to person, which makes dosing less predictable.
What you eat alongside an edible matters. In animal studies, consuming cannabis with fatty foods increased THC absorption by more than 2.5-fold compared to taking it without fat. Researchers found that at least one-third of the THC dose became available for absorption when consumed with lipids like sesame oil. This likely applies to humans as well, which is why many edible products are made with butter, coconut oil, or other fats.
Capsules work the same way as edibles but in a standardized pill form. They tend to take 30 to 90 minutes to kick in and can last 6 to 12 hours, making them a common choice for people seeking sustained relief over a longer period.
Because of the delayed onset, it’s easy to take too much before the first dose has fully kicked in. The slow, unpredictable timeline is the single biggest source of uncomfortable experiences with edibles.
Tinctures and Sublingual Products
Tinctures are liquid cannabis extracts, usually in an alcohol or oil base, designed to be held under the tongue for 30 to 60 seconds before swallowing. The tissue under your tongue (the sublingual mucosa) is thin and rich in blood vessels, allowing THC to pass directly into your bloodstream within 2 to 10 minutes.
This route bypasses the liver on the first pass, which means less of the THC gets converted into the more potent metabolite that makes edibles hit so hard. The result is a faster, more predictable onset than edibles, with somewhat milder peak effects. If you swallow the tincture instead of holding it under your tongue, it essentially becomes an edible and follows the slower digestive pathway.
Topicals
Cannabis topicals include creams, balms, lotions, and salves applied directly to the skin. They are typically used for localized pain, inflammation, or skin conditions. Cannabinoids are molecules with naturally low skin penetration. They tend to build up in the outermost layer of skin (the stratum corneum) and generally do not reach the bloodstream in meaningful amounts. This means standard topicals provide localized relief without producing a high.
Transdermal patches are a different technology. They use specialized delivery systems with penetration-enhancing agents designed to push cannabinoids through deeper skin layers and into the bloodstream. Early pharmacokinetic research in humans has demonstrated that CBD and THC can enter systemic circulation through transdermal delivery, though this technology is still relatively new. Unlike a cream or balm, a transdermal patch can produce full-body effects.
Suppositories
Cannabis suppositories, inserted rectally or vaginally, are a less common but medically relevant route. Rectal suppositories produce plasma concentrations of THC that are about 2.4 times higher than oral capsules, making them significantly more efficient at delivering the compound into the bloodstream. At the same time, rectal administration tends to produce less of a feeling of intoxication compared to oral use, since the effects are more localized.
Suppositories have found a niche in managing gynecological pain and sexual pain. A systematic review of 16 studies found that CBD or THC at therapeutic doses reduced gynecological pain in 61% to 95.5% of participants after three months of use. They’ve also been used to help with the discomfort of vaginal dilator therapy following cancer treatment, where the suppository can serve as both a pain management tool and a lubricant.
How the Method Changes the Experience
The gap between the fastest and slowest routes is dramatic. Inhaled cannabis peaks in under 10 minutes and effects can persist up to 24 hours at the outer extreme, though most sessions are far shorter. Edibles take 30 minutes to 2 hours to begin working but often produce a longer, more intense experience. Sublingual products split the difference, offering a faster onset than edibles without the respiratory involvement of smoking.
Bioavailability is the other major variable. When you smoke or vape, about 30% of the THC reaches your blood. When you eat it, only 4% to 12% makes it through your digestive system, though the metabolite your liver produces is more potent. Eating cannabis with fatty food can more than double absorption, partially closing that gap. Rectal suppositories outperform oral consumption by roughly 2.4 times in terms of blood concentration.
Your choice of method ultimately depends on what you’re looking for. Inhalation offers speed and control. Edibles and capsules offer duration and discretion. Tinctures offer a middle ground. Topicals keep effects localized. And suppositories offer high bioavailability with reduced intoxication, which makes them useful in specific medical contexts.