Medical marijuana is available in more than a dozen distinct product types, ranging from traditional dried flower to transdermal patches that deliver cannabinoids through the skin into the bloodstream. The form you use changes how quickly effects begin, how long they last, and how much of the active compound your body actually absorbs. Here’s what each category looks like in practice.
Smoked Flower
Dried cannabis flower remains the most common form. CDC survey data from 2022 found that 79.4% of current cannabis users reported smoking as their primary method. Flower is sold in pre-rolled joints or as loose buds meant for pipes or water pipes. THC concentrations in flower typically range from about 15% to 30%, depending on the strain.
Inhaled cannabis reaches peak blood levels within 6 to 10 minutes, making it the fastest-acting option alongside vaporizers. The tradeoff is that smoking produces combustion byproducts, which is why many medical programs and dosing guidelines steer patients toward other formats when possible. Effects from smoked flower generally fade within two to three hours.
Vaporizers
Vaping heats cannabis oil or dried flower to a temperature that releases cannabinoids as vapor without full combustion. About 30% of cannabis users reported vaping in 2022, up significantly from earlier surveys. Vape products come as disposable pens, refillable cartridges filled with cannabis oil, or tabletop devices designed for ground flower.
Onset is comparable to smoking, peaking within roughly 10 minutes. Bioavailability through inhalation (whether smoked or vaped) averages around 31%, meaning your body absorbs about a third of the THC in the product. Vaping was most popular among adults aged 18 to 24 in the CDC data.
Concentrates and Dabbing
Concentrates include wax, shatter, rosin, live resin, and hash oil. These products are significantly more potent than flower, generally ranging from 60% to 90% THC. Dabbing, the most common way to use concentrates, involves heating a small amount on a hot surface and inhaling the resulting vapor. About 14.6% of cannabis users reported dabbing in 2022.
Because concentrations are so high, even a small amount delivers a large dose. This makes concentrates poorly suited for people new to cannabis or those who need precise, low-dose control. The equipment itself, which often involves a handheld torch, also carries a burn risk.
Edibles
Edibles include gummies, chocolates, baked goods, capsules, and beverages. They were the second most popular form in 2022, with 41.6% of users reporting oral consumption. Edibles are sold in standardized doses, commonly 5 mg or 10 mg of THC per piece, making them easier to dose precisely than flower.
The experience of an edible is fundamentally different from inhaling. When you swallow THC, your liver converts it into a more potent metabolite before it reaches your brain. This process, called first-pass metabolism, means edibles produce higher levels of that active metabolite relative to THC itself compared to smoking. The result is often a stronger, more body-centered effect.
The catch is timing. Only about 6% to 10% of the THC in an edible reaches your bloodstream, and peak effects can take anywhere from one to four hours to arrive. Effects also last much longer. After a single oral dose, THC remains detectable in the blood for at least 24 hours, compared to roughly 12 hours after smoking. This delayed onset is the main reason people accidentally take too much: they feel nothing after an hour, take a second dose, and both hit at once.
Oils and Tinctures
Cannabis oils and tinctures are liquid extracts, usually packaged in small bottles with a measured dropper. You can swallow them directly, mix them into food, or hold them under the tongue (sublingual use). Sublingual absorption bypasses the digestive system to some degree, typically producing effects faster than a standard edible, though still slower than inhalation.
Oils are the format most commonly referenced in clinical dosing guidelines. A consensus panel of pain specialists recommended that most patients start with 5 mg of CBD twice daily, increasing gradually. If CBD alone doesn’t meet treatment goals at 40 mg per day, the protocol suggests adding THC at just 2.5 mg per day and titrating slowly. These low starting doses reflect how potent oral cannabinoids can be once metabolized, and oil droppers make this kind of precise, milligram-level dosing straightforward.
Capsules and Tablets
Gel capsules and tablets contain a pre-measured amount of cannabis oil, removing the guesswork of a dropper. They behave like any other edible in terms of onset and duration: slow to start, long-lasting effects. Some newer formulations use nanoemulsion technology, which breaks cannabinoids into tiny particles that absorb faster. In one clinical study, a nanoemulsion powder reached peak levels of THC’s active metabolite in about 50 minutes, compared to over four hours for a standard oil. This faster absorption could make capsules more practical for patients who need predictable timing.
Topicals
Topical products include creams, balms, lotions, and salves applied directly to the skin. Standard topicals are designed for localized relief. The cannabinoids penetrate the skin layers and interact with receptors in nearby tissue but generally do not enter the bloodstream in meaningful amounts. This means they typically don’t produce the “high” associated with THC, making them an option for people who want localized effects without systemic ones.
Transdermal Patches
Transdermal patches look similar to nicotine patches and are designed to push cannabinoids through the skin and into systemic circulation. This is a meaningful distinction from regular topicals. Newer delivery systems use penetration-enhancing agents and vasodilators to open channels in the skin and increase blood flow at the application site, actively transporting cannabinoids into the bloodstream. Transdermal delivery may provide more constant blood levels of cannabinoids over time, with potentially reduced psychoactive intensity compared to inhaled or oral routes.
Suppositories
Rectal and vaginal suppositories are a less common format available in some dispensaries. They bypass first-pass liver metabolism, similar to sublingual absorption. They’re primarily used by patients who can’t take oral medications due to nausea, vomiting, or gastrointestinal conditions.
What Your State May Restrict
Not every form is legal in every medical marijuana program. Several states limit patients to low-THC oils only, sometimes capped at 0.9% or 1% THC by weight. A handful of states permit only CBD-based products with no more than 0.3% THC, and some restrict use to specific conditions like intractable epilepsy. Texas, for example, caps medical cannabis at 1% THC and requires physicians to document each prescription in a state registry. Other states with full medical marijuana programs allow flower, edibles, concentrates, and topicals alike.
Before purchasing, check your state’s specific program rules. The form restrictions can be significant: a state that allows only low-THC oil is offering a fundamentally different product than one that permits full-spectrum flower or concentrates at 60% to 90% THC.
Shelf Life and Storage
Cannabis products do degrade over time. Properly stored herbal cannabis and resin extracts remain reasonably stable for one to two years when kept in the dark at room temperature. Light and heat are the main enemies, gradually breaking down THC into less active compounds. Edibles like gummies and chocolates follow the shelf life of their food base, typically six months to a year. Oils stored in dark glass bottles in a cool environment tend to hold potency for about a year. If a product changes color, smells off, or tastes noticeably different, it has likely degraded.