medical marijuana dosage

Getting the right dose: taking a good look at medicinal cannabis products

Leafcann Group Pty Ltd showcase the variety of delivery methods available and the importance of GMP certified products.

In today’s environment there is an abundance of medical cannabis products to treat a range of diseases and conditions. These products can be broken down into the delivery method of how they are administered to patients, which include but are not limited to:

  • Oral administration of liquids – oils, tinctures and beverages containing medical cannabis;
  • Oral administration of solids – specially formulated capsules/tablets, edible products, normal food containing medical cannabis powder or oil;
  • Topical administration straight on to the skin – creams, balms, ointments, transdermal patches;
  • Suppositories – typically by a specially formulated tablet or capsule;
  • Inhalation – smoking dried flower, inhaling smoke from burning resin and vaporisers; and
  • Insufflation – nasal sprays.

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There is no right or wrong way to take medicinal cannabis. Each method has its benefits and drawbacks. For some, the onset of relief is quick but does not last long while others come on slow and last much longer. Some affect the whole body, while others target specific areas.

At the heart of all medical cannabis products lies the issue of being able to deliver the correct dose to treat the condition or disease in question. The next most important thing to consider is the impact on a patient’s lifestyle and their ability to continue taking their medication reliably and effectively. A tablet containing a strong dose of THC may be convenient, but the dose may be so strong that it impairs driving or operating heavy machinery. However, being able to take much smaller doses over the course of a day may allow a normal quality of life while still deriving the benefits needed to treat a condition or disease. Time-release wafers, capsules or biofilms also offer benefits when wanting to delay the release of certain cannabinoids, while accelerating the delivery of others, to maximise patient outcomes.

Another consideration for choosing a delivery method for medicinal cannabis is the ‘first pass effect.’ This is the effect of enzymes in the liver breaking down cannabinoids such as CBD and THC before they reach the brain or other organs in the body, resulting in a smaller proportion of the original dose getting to where it should. Although the first pass effect is strongest through oral consumption, it still effects, although to a lesser extent, drugs taken through other routes such as buccal (absorption through the cheek), sublingual (under the tongue) or insufflation (blowing a vapour into the nose).

It is important to note that cannabinoids such as cannabidiol (CBD) and tetrahydrocannabinol (THC) are hydrophobic (they don’t mix well with water) and lipophilic (they easily mix with fats and oils). Therefore, it is very difficult to make water-based medicines containing cannabinoids. Some producers claim to have solved this through nano-encapsulation, but as yet none have completed randomised clinical trials to confirm this. In addition to this, cannabinoids are sensitive to light and oxygen, which is why doctors and pharmacists have traditionally stored them in sealed dark bottles.

Other limitations that influence product choices include the condition-dependent degradation of the acid forms THCA (tetrahydrocannabinolic acid) and CBDA (cannabidiolic acid), along with the varying shelf life of medical cannabis products, which depends on the interaction between the active ingredients and different carrier oils.

Dose titration and micro dosing

In the medicinal cannabis world, you will hear the cautionary advice ‘start low and go slow.’ This refers to starting on a low dosage, reviewing how that affects your body and mind and then determining whether you need to increase or decrease the dosage. In medical terms it is known as dose titration.

The ability to dose titrate is particularly important when taking medication such as THC. In consultation with a health professional, it is possible to incrementally find out what works best for a patient’s condition and lifestyle, but this takes time and a commitment from both doctor and patient.

Microdosing involves taking very small doses of a drug to obtain the positive benefits without incurring the negative side effects of a large dose. A micro dose can be as small as 1/20th of a normal dose. Microdosing works well with cannabis, where it can provide relief from anxiety and depression, allow a patient to have a sharp and clear focus and help with insomnia – all at very low doses.

One of the reasons microdosing works well with cannabis medicines is that the active cannabinoids work via both receptor mediated and off-receptor actions. The endocannabinoid system adjusts receptor number in target tissues according to processes that are not completely understood but appear to involve very small amounts of the active compounds ‘tuning’ receptor number and sensitivity.

Taking a closer look at the medical cannabis products

Capsules and tablets

Tablets and capsules (pills) are the quintessential pharmaceutical preparation. They represent exactness and precision of dosing. They are easy to transport, discreetly taken in public and generally have long lasting effects. However, tablets are also affected by first pass metabolism when taken orally, less so if used as a suppository or pessary.

Pills can take 45 minutes or longer for the active ingredient to enter your system, however, once onset of relief has started it lasts for several hours. Some capsules reportedly last for up to 8 hours. Pills may be hard to swallow for those with nausea symptoms and therefore not suitable for some. Pills are harder to dose titrate, particularly if looking for more immediate relief, as the onset of action takes time. If the dosage is not right, a patient may need to see their health practitioner and go through the whole process again.

Oils, tinctures and sublingual sprays, bio-films and buccal wafers

Oils are the most commonly produced form of medicinal cannabis. They are relatively easy to administer and titrate, simply by adding or subtracting more drops into your mouth or under your tongue, one drop at a time. The process of creating oils involves taking cannabis dried flower, extracting the cannabinoids and then typically adding a carrier oil which helps to contain the cannabinoids. Most medicinal cannabis manufacturers will initially extract their cannabinoids into an oil and send it off for further processing into final dose forms if necessary.

Sublingual administration involves placing drops under the tongue and holding for a minute to allow absorption of actives. This method works more quickly and effectively than ingested capsules or tablets. The onset of relief, when placed under the tongue, is within an hour and will last several hours. The difference between placing oil under the tongue rather than on top is that while sublingual (under the tongue) will be absorbed into the body via the bloodstream immediately, supralingual (on top of the tongue) will be swallowed and then digested, with the active ingredients eventually making their way to the intestines, broken down by enzymes and eventually be absorbed into the bloodstream, taking much longer.

Bio-films and buccal wafers act in a similar way to sublingual drops, being absorbed either under the tongue or via contact with the buccal mucosa at the top of the palate in the mouth. The added benefit of bio-films and wafers is dose control, taste and the ability to layer different active ingredients into layers within the bio-film or wafer, which allows different cannabinoids to be absorbed at different rates. This is especially useful where THC is needed for immediate acute pain relief.

Tinctures are alcohol-based cannabis extracts and were the most common form of cannabis medicine early in the 20th century. In chemistry, a tincture is a solution that contains ethanol as its solvent, although tinctures may use other alcohol or
glycerol preparations.

Some patients opt to put drops of oil or tincture into drinks such as fruit smoothies or add it to their food. While this may make it easier for some, the problem is that it will take longer to work because the body must digest it first. It is always more effective to dose directly rather than place medicine in food.

Edibles and other food preparations

Edibles are any food item that contain cannabis. Placing medication in food has been discussed, however, there are now medical cannabis products on the market that are specially formulated medicines to be ingested as a food item on their own. They can come in forms such as soft jelly lollies, pastes and even butter. Edibles are usually high in fat, as this allows the cannabis to be infused more easily.

Beverages infused with cannabis are also making entries into the therapeutic market. However, as was mentioned earlier, cannabinoids do not mix easily with water. This should serve as warning to those wanting to consume products such as CBD water, which may have traces of CBD that are so small the only benefit the water may give is through simple hydration.

Edibles are useful in public situations such as in the workplace when discretion is preferred. Forms such as gummy bears, mints or chocolates can mask both the smell and taste of cannabinoids. As with any food medicines, the first pass effect means that it might take over an hour for the medicine to start working, although that is at a reduced rate because only some of the medicine has been absorbed.

All cannabis products consumed orally will have a whole of body effect. They are useful for conditions such as anxiety, insomnia, nausea, spasticity, tremors and overall pain, including arthritis. They are not as useful for conditions where a specific area needs to be targeted, such as pain in an elbow or knee. These conditions are better targeted with products such as transdermal patches or lotions.

Topical treatments including creams, ointments and transdermal patches

The advantage of topical treatments is that they can be applied directly to the affected area and focus the benefit there. One of the disadvantages of CBD and THC not being water soluble is they have low skin penetrability unless attached to certain types of carrier oils. This lack of penetration is useful however in cases where you do not want a topical with THC to enter the bloodstream where it can affect your whole body and get you ‘high,’ but instead work solely on a specific area.

The rate of absorption from creams and ointments is variable from product to product and person to person. Transdermal patches are different. Although most commonly associated with nicotine, transdermal patches are now used for a broad range of treatments, from motion sickness to contraception. Transdermal patches have the ability to slowly release cannabinoids into your body over a long period of time. Some of these patches are reported to last up to 96 hours. An added benefit is that if a patient isn’t happy with the treatment, they can simply take the patch off.


Vaporisers can heat cannabinoids to a high temperature, but not so high that they burn the cannabis to produce smoke; nor do they have the odour associated with burning cannabis. The treatment itself provides relief in about five to ten minutes and lasts about two to four hours. Unlike normal smoking, vaporisers are able to deliver consistent doses into the lungs of known composition and consistency when using cartridges or oils produced under GMP conditions. As the recent vaporiser health crisis has shown, ensuring both the vaporiser and the cartridge of cannabis material have been produced by a licensed GMP producer is essential to safety.

Only trust GMP produced products

It is necessary to provide a warning about purchasing products from family, friends and other entities that are not GMP facilities. Home-made products, such as unprocessed oils, contain the same cannabinoids and the same ratios of cannabinoids (such as CBD to THC), and other chemicals like fertilisers and pesticides as the plants from which they are derived. Therefore, if the plant changes, or its growing environment changes, the composition of the oil will also change. You cannot be certain that every batch will be the same and this can lead to undesirable consequences. Not knowing the composition can impair your ability to work, drive or even stay awake.

Products made from hemp can also produce variability in composition unless processed in facilities that will ensure the medicine is exactly the same for every dose in every product line. Medicinal cannabis is a medicine and should only be prepared by professionals who can account for what is in the medication. Unlike professionally made products in GMP laboratories, non-pharmaceutically produced products cannot guarantee their content. Sometimes the producer may not know themselves.

What does the future hold?

There is a lot of opportunity for innovation in developing medical cannabis products. Patients will be looking for products with a variety of options that fit their needs. Many will look to products that work immediately and last a long time. This will involve novel ways of administration, including options such as nasal sprays which have the ability to be absorbed very quickly into the bloodstream or patches that might be able to lower or increase dosage automatically. Future products will need to offer long lasting effects as well as short lasting effects. They will need to be able to target specific areas and not others.

Patients of the future will want specially made, patient centred medications that are tailor made for them and their needs. The fact that the cannabis plant contains a large number of active cannabinoids, and other compounds such as terpenes and flavanols, suggests that it may be an excellent source of personalised precision medicines, but this represents significant technical challenges for the sector.

  • Arafat, Mosab & Al-Hanbali, Othman & Sarfraz, Muhammad. (2018). Transdermal patches: Design and current approaches to painless drug delivery. Acta Pharmaceutica. 69. 1-19
  • Baker D, Pryce G, Giovannoni G, Thompson AJ (May 2003). “The therapeutic potential of cannabis”. Lancet Neurol. 2 (5): 291–8
  • Bruni N., Della Pepa C., Oliaro-Bosso S., Pessione E., Gastaldi D., Dosio F. Cannabinoid Delivery Systems for Pain and Inflammation Treatment. Molecules. 2018;23:2478
  • Lewis M.A., Russo E.B., Smith K.M. Pharmacological Foundations of Cannabis Chemovars. Planta Med. 2018;84:225–233. doi: 10.1055/s-0043-122240
  • website. Microdosing: smart psychedelics explained
  • University of Sydney. Lambert Initiative webpage: What products are available?

Elisabetta Faenza
Leafcann Group Pty Ltd
+61 414 447 275
[email protected]

This article will appear in the first issue of Medical Cannabis Network which will be out in January. Click here to subscribe.

Leafcann Group Pty Ltd showcase the variety of delivery methods available and the importance of GMP certified medical cannabis products.

Know your dose: How to decide how much to take

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  1. Important factors to consider
  2. The therapeutic window
  3. Incremental dosing
  4. Dosing considerations for different product types

Medical cannabis is a highly personal affair. When it comes to finding the perfect dose, dozens of variables factor into the equation. Differences in product types, potencies, individual genetics, weight, age, and so on produce unique experiences every time an individual chooses to consume cannabis.

With so little research available, it requires an ongoing effort to determine the best cannabis dose for each person’s specific medical needs. Doctors are a good starting point. However, it’s helpful to know how different factors play into your cannabis experience. This knowledge can empower you to make informed, safe decisions about your medical cannabis use.

In this article, we take a deep dive into finding the optimal dose, how to incrementally adjust the dose, and what to keep in mind when using different forms of medical cannabis.

Important factors to consider

Every person has a unique endocannabinoid system (ECS) and, as such, a different response when they consume cannabis. It’s essential to know what type of product at what potency produces what kind of response. Determine your medical cannabis goals and slowly work to find what allows you to reach those goals.

Every person has a unique endocannabinoid system (ECS) and, as such, a different response when they consume cannabis. Photo by: Gina Coleman/Weedmaps

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Some patients find success with 1 milligram of cannabis, while others require much more potent doses. However, while higher doses will have more potent effects for a time, subsequent dose increases will result in weaker effects accompanied by more adverse reactions. And the highest dose is hardly the most cost-effective. Medical marijuana is expensive, and consuming more doesn’t necessarily equate to more relief.

The optimal dose, then, is the lowest amount that provides adequate therapeutic relief without adverse effects.

The therapeutic window

A therapeutic window is a period in which one can observe measurable therapeutic effects, while adverse side effects are avoided.

The therapeutic window for novice cannabis users is much narrower than for seasoned consumers. The ECS is a highly tuned instrument that responds to overstimulation by diminishing cannabinoid receptors, meaning higher doses will be required to achieve the same therapeutic effect. With higher doses come higher chances of adverse effects. .

“Start low, go slow,” is advice provided by many dispensaries, with clinical research to back it up. A 2012 study showed that patients with advanced cancer experienced more effective pain relief with fewer side effects by using lower doses of cannabis spray. Another study found that low doses of vaporized cannabis were equally effective in relieving nerve pain as higher doses and the smaller doses were less likely to have a significant impact on daily cognitive function.

Clearly, there’s an upper limit to cannabis’ effectiveness. While to date, there is no known lethal dose to cannabis, it’s possible to experience unwanted anxiety or paranoia by consuming too much.

This is where incremental dosing comes into play.

Incremental dosing

Except in some states, physicians aren’t allowed to provide patients with a specific medical marijuana dose, as they would for other prescription drugs. Therefore these patients must gradually increase doing to figure out what works best for their physiology, symptoms, and cannabis goals.

Check for cannabinoids

It’s essential to know precisely what’s in a medical cannabis product before purchase. Check the label for cannabinoid percentages (potency) and terpene content, which plays an important role in cultivar-associated experiences via the entourage effect.

The cannabinoid makeup of a medical marijuana product can dramatically affect the users’ experience. Photo by: Gina Coleman/Weedmaps

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The cannabinoid makeup of a medical marijuana product can dramatically affect the users’ experience. THC, the most well-known cannabinoid, is responsible for the psychoactive intoxication of cannabis and may provide a host of medicinal properties. CBD, the plant’s second-most abundant cannabinoid, has its own list of reputed therapeutic benefits, as well as overlapping qualities while acting on different physiological mechanisms than THC.

Many studies show that CBD may protect against cognitive impairment caused by THC. THC and CBD used together, depending on the dosage and consumption method, could offer a patient higher therapeutic value.

Determine your cannabis baseline

By starting with lower levels of potency, patients allow the ECS to self-correct and achieve equilibrium. Less potency will be needed for maintenance, reducing tolerance build-up, unwanted side-effects, and financial expenditure in the long run.

A clean slate allows you to establish a tolerance baseline from which you can determine your optimal cannabis dose. In an interview with, Dr. Chris Emerson recommended regular users start with a 48-hour break to reset the system. More seasoned cannabis users might require a more extended tolerance break.

After the break, try a three-milligram dose of THC. Observe and write down how it feels. The next day, try three milligrams of CBD and observe those effects. Take the next week to try different combinations of THC and CBD while keeping the total less than 3 mg.

As you establish a baseline, you can begin to experiment with more precise doses. Keep your medical cannabis goals in mind as you mix different ratios, try dosing at various times during the day, timing meals with your dose, etc. From here, you can steadily increase your dosage in small increments as needed until you reach the lowest amount that delivers your desired results.

Microdosing is also increasing in popularity as people seek the therapeutic benefits of cannabis without diminishing cognitive capacity. Some users start with 1 to 2.5 mg, just enough to mitigate symptoms that would otherwise affect their ability to work.

Dosing considerations for different product types

Optimum dosing depends on the type of cannabis product. Some offer more consistent and precise options than others. Edibles, for example, can be broken into smaller serving sizes, whereas flower potency ranges based on cultivar type, its growing conditions, bioavailability, and cannabinoid makeup. Other products offer an innately more potent experience, such as dabbing concentrates, while others have longer onsets and durations.


Smoking cannabis flower provides a quick onset of effects within seconds of inhalation, hitting a peak at around 30 minutes, after which it lasts anywhere from one to three hours.

Smoking cannabis flower provides a quick onset of effects within seconds of inhalation. Photo by: Gina Coleman/Weedmaps

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Each strain, or cultivar of marijuana flower varies in potency and cannabinoid content, and differences often exist in strains with the same name. A cannabis plant’s compounds can change based on it’s growing conditions and how it’s cured and dried. Purchasing a product from the same cultivator or brand help ensure a similar experience every time.

However, it’s difficult to accurately dose cannabis flower, even when it’s purchased from the same breeder and crop. Say a lab result reports that a strain has 10% THC, and you are buying one gram. This means that there are 100 milligrams of THC in the amount you purchased. When smoked, only approximately 50% of the THC in flower enters the bloodstream while the remainder burns off, leaving behind 50 mg of cannabis in our example. At this point, it’s hard to separate a single gram into several doses without guessing.

A good starting point is taking one or two hits off a small bowl and waiting up to an hour to see how you feel. You can always smoke more if you don’t achieve the desired result.

Vaporizers heat cannabis flower or extracts to their vaporization point, at which consumers inhale the vaporized trichomes and terpenes. Effects appear within seconds, peak within 15 minutes, and last anywhere between one and three hours.

Vaping flower presents similar challenges to smoking it, namely how to measure doses precisely. Vape cartridges, alternatively, typically show THC percentages on the box, and some manufacturers give a rough estimate of how many hits are in a single cartridge.

Cannabis oil, another vaping choice, is also more potent than flower. Photo by: Gina Coleman/Weedmaps

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Cannabis oil, another vaping choice, is also more potent than flower, so fewer hits introduce more cannabinoids to your system.

Concentrates and dabs

Cannabis concentrates are considered a more advanced method of consumption not recommended for novice medical users. Concentrates, or dabs, are highly potent cannabis extracts that contain an average of 60% to 99% THC, up to five times the amount in cannabis flower. Fast-acting dabs hit your system immediately and last up to three hours.

Dabs are usually sold in half-gram or full gram amounts. If a dab has 60% potency, there are 600mg of THC in a gram of the concentrate.

Some types of concentrates are easier to break into smaller portions than others. Shatter, for instance, can be cut into even pieces and weighed on a small scale. Wax or resin, on the other hand, don’t lend themselves to easy measuring. Most consumers recommend starting with a single dab no bigger than the tip of a nail or ballpoint pen.

Using the right tool also makes it easier to portion a precise dab dose. A sharp, flat tool will more easily slice shatter, while a spoon scoops up more precise servings of gooey rosin.

Dabs are recommended for seasoned users or those who require more substantial doses. Photo by: Gina Coleman/Weedmaps

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Remember, start low and go slow. Dabs aren’t for the faint of heart. They are recommended for seasoned users or those who require more substantial doses.


The body processes THC in edibles differently than other cannabis products. After digestion, the liver transforms THC into 11-hydroxy-THC, a compound that’s more potent than THC, lasts longer, and has more sedating properties. It takes 45 to 60 minutes for edibles to kick in and effects last for up to six hours, depending on the dose and an individual’s metabolism.

Edibles’ packaging will list cannabinoid potency in milligrams per product. Many professional edible producers will evenly mix cannabinoids throughout the food, which allows consumers to divide it into smaller serving sizes. For example, an infused chocolate bar may contain 50 mg of THC total and be easily broken into 10 pieces of five milligrams each.

Edibles’ packaging will list cannabinoid potency in milligrams per product. This precise division makes consuming smaller doses easier and produces more consistent effects. Photo by: Gina Coleman/Weedmaps

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This precise division makes consuming smaller doses easier and produces more consistent effects. With edibles, it’s advisable to start with a low dose, such as one to five milligrams. Wait 24 hours to evaluate the dose’s efficacy and slowly increase by 1 mg every 24 hours until you reach the desired relief.


Cannabis tinctures are made by dissolving cannabis in an alcohol or oil solution. Tinctures are crafted with specific amounts of ingredients and packaged in dropper bottles, allowing patients to precisely and discreetly self-dose by dropping the liquid under the tongue or mixing it into a beverage. Effects occur within 20 to 30 minutes and last two to three hours. Start with a small amount, such as 0.5 or 1mg THC, and wait at least an hour before increasing the dose.

Tinctures are crafted with specific amounts of ingredients and packaged in dropper bottles, allowing patients to precisely and discreetly self-dose. Photo by: Gina Coleman/Weedmaps

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Tinctures are meant to be absorbed in the mouth. This requires a person to use their tongue to rub the product in, under the tongue and inside of the cheeks, allowing the product to remain in the mouth for 2-3 minutes. If a tincture is swallowed before it is fully absorbed, it acts more like an edible, and the effects can last up to 6 hours. Many patients use tinctures this way before bed, as a sleep aid.


Topicals are lotions, ointments, or transdermal patches that are usually non-intoxicating and provide relief for a host of benefits. Because they don’t present adverse side effects, topicals are an excellent choice for novice cannabis users or those with a low-THC tolerance.

Topicals are lotions, ointments, or transdermal patches that are usually non-intoxicating and provide relief for a host of benefits. Photo by: Gina Coleman/Weedmaps

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In order to reap the benefits of topicals, they must be fully absorbed into the skin. This requires rubbing the product (such as a lotion) all the way in, until the skin is essentially dry. Many patients report the best results when they apply topicals frequently, up to every two hours.

Know your dose: How to decide how much to take Copy article link to clipboard. Link copied to clipboard. Contents Important factors to consider The therapeutic window ]]>