What can we help you with?

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Registering with Tantalus Prime is simple! 

  1. Complete a registration application.
  2. Visit your Healthcare Practitioner, and have them fax your Medical Document to 1-855-309-7348.

We'll process your documents and you will be emailed login info. Generally, you'll receive an approval email between 1-3 business days of completing your registration. 

It's easy to transfer your medical document to Tantalus Labs. Simply call up your current Licensed Producer, and tell them you'd like your medical document transferred to Tantalus Labs. They'll take care of the rest. 

We offer shipping services through Xpresspost by Canada Post and Purolator Express. Generally, we advise allowing 1-3 business days for shipping and processing orders. 

We offer free shipping for orders of 21 grams or more. 

Shipping rates for orders of less than 21 grams are calculated based on carrier, parcel size, and destination.



Yes, we can refer you to a Health Care Practitioner who will assess your eligibility for medical cannabis. 

If you are outside of Alberta, Saskatchewan, and Quebec, you can book with us via Green Ocean Clinics link here.

Alberta patients can book an appointment with Compass Clinic

Other partners:


Lyte Clinic


OCannabis Clinic

Get in touch with us for more specific referrals based on your location and needs.

Yes, as long as you are using a different medical document for each LP. You can split your prescribed daily prescription amount among different LPs with separate medical documents. Contact your Healthcare Practitioner to process this request.

You can use your 'Notification of Registration Approval' or your 'Shipping Confirmation' as proof of your medical cannabis prescription. These documents include your registration information, healthcare practitioner information, and your daily gram allotment. 

We send these documents out via email with approvals and order tracking numbers. If you can't find yours, let us know and we'll help.  

THC and CBD are the two most common cannabinoids found in cannabis. These cannabinoids interact with our Endocannabinoid system to create varying psychoactive and physiological effects.

THC is most commonly known to create psychoactive effects when consumed. While CBD is its non-psychoactive counterpart. Both THC and CBD can help alleviate symptoms and have therapeutic effects. 

Curious to know more? Check out our Populace post for a more in-depth look at cannabinoids. 

Find out more about CBD here. 

Indica and sativa are considered to be a species of the genus Cannabis. However, it’s relatively rare to find either a pure Sativa or a pure Indica variety, as most cultivated varieties of cannabis today are a hybrid of the two, being either indica or sativa dominant.


As more scientists study this plant, we’re learning that the classification of cannabis into Indica, Sativa, and Hybrid is incredibly oversimplified and the subject of intense debate. The cannabis plant contains a huge array of cannabinoids, terpenes, and flavonoids, all of which interact with your body’s biochemistry in a very unique way. This means that you may have a totally different reaction to one strain, then say, the next person.


We’ve found that a better way to classify cannabis is to go by the ratio of THC to CBD. That’s why you’ll see all of our cultivars in three different categories, THC dominant, CBD dominant, or a balanced ratio.

Terpenes are the fragrant compounds that give cannabis it’s aromatic diversity. Found throughout the natural world, terpenes and can be found in many other plants, herbs and fruits. This is why certain strains will have the familiar notes of citrus, blueberry, pine, hops, etc. 

Learn more about why terpenes matter for cannabis here. 

The term ‘balanced’ refers to the near equal amounts of THC and CBD content. These products offer the benefits of a fuller spectrum cannabinoid profile. With a balanced concentration of CBD and THC, you get the best of both worlds.