What is Medical Cannabis? What is it treated for?
Cannabis Based Medical Products (CBMPs) or Medical Cannabis are medications derived from the
cannabis plant, containing cannabidiol (CBD) and/or Tetrahydrocannabinol (THC – which is the
psychoactive substance in cannabis). In the UK medical cannabis has been legal since 2018 for the
treatment of psychological, neurological, and chronic pain conditions as well as, palliative and/or end
of life care: for sake of brevity a full list of conditions treated in the UK is highlighted in eligibility
section of this website.
What’s the eligibility criteria?
With cannabis based medical products (CBMPs) being unlicenced, the census would be for patients
to evidence unmet clinical needs i.e., their health is not improving despite having ongoing treatment
or interventions via conventional healthcare services. It is important for all patients to recognise that
due to cannabis containing a psychoactive substance, for the safety of potential patients, if you have
any of the diagnosis listed in the exclusion criteria, you will not be eligible. We would advise these
patients to liaise with their consultants at the NHS and explore an alternative treatment method to
support their health needs.
Patients have a right to a second opinion, provided they do not have any counterindications listed in
the exclusion criteria below. Patient’s must be over 18 years of age.
Exclusion Criteria?
Like all medications, CBMPs is not advisable to use if you struggle from one of the following: –
- Suffer with high BP (If this is not stable)
- History of psychosis
- Diagnosis of schizophrenia
- Heart condition (Which has NOT been stable for 6+ months)
- Pregnant or breast-feeding
What are the side effects of medical cannabis?
Side effects of CBMPs include:
- Drowsiness
- Confusion
- Imbalance
- Euphoria
- Diarrhoea
- Dry mouth
- Anxiety and/or Depression
- Heart Palpitations
- Psychological Dependence
- Tolerance
- Cannabis hyperemesis syndrome (CHS)
Adverse reactions include:
- Headaches
- Migraines
- Nausea
- Vomiting
- Diarrhoea
If you experience an adverse reaction, it is important that you report your symptoms to the MHRA
via yellow card, who are the medicines and healthcare products regulatory agency. To report a yellow
card, please follow this link and fill out the form: Yellow Card | Making medicines and medical
devices safer (mhra.gov.uk). It is also vital that you inform your clinic, to ensure this medication is not
prescribed to you again in the future.
Cannabis dependence:
Cannabis dependence is known clinically as cannabis use disorder, and user’s of any form of
medicines, including medical cannabis are prone to psychological dependency.
Signs of Psychological dependence include:
- Not using medications as prescribed -> using more than required or larger dosages and/or
- more frequently
- Withdrawal
- Developed a tolerance and require more
- Failed repeated attempts to control or stop use
- Physical or psychological concerns related to use (i.e., respiratory concerns or fluctuation in
- mood)
- Missing relevant appointments or work to use
- Craving for purposes other than prescribed
If you experience any of the following, please get in touch with your prescriber, so that they may
manage this concern accordingly.
Cannabis Hyperemesis Syndrome (CHS) :
Cannabis hyperemesis syndrome, also known as cannabinoid hyperemesis syndrome can affect
people who are exposed to prolonged, high doses of cannabis: this can also occur with medical
cannabis use.
Signs of Cannabis Hyperemesis Syndrome include:
- Severe Nausea
- Severe Vomiting
- Abdominal Pain
- Loss of appetite
For more information, visit: Cannabinoid Hyperemesis Syndrome (CHS): Causes, Symptoms &
Treatment (clevelandclinic.org) .
Although this is uncommon, if you experience any of the following, please reduce use or stop where
possible and urgently alert your prescriber. If symptoms are uncontrollable, please seek urgent
medical intervention as you are at risk of dehydration.
Monitoring BP / Warfin prescription
Medical cannabis can for some people cause heart palpations, it is important that people with a
history of high blood pressure or a heart condition to be mindful of this, particularly those on
warfarin as cannabis can impact the liver enzymes, interacting with other medications. It is important
that you work alongside your GP and relevant health care professionals to adequately address your
heart.
If you are someone who meets this criterion, regularly monitoring your blood pressure would aid in
ensuring your safety and enables you to appropriately reach out for support.
Blood pressure guidance:
| Low | 90/60 or below | Inform GP and clinic, if unwell seek medical attention |
| Ok | 90/60 – 140/90 | Continue to monitor – update clinic at FUP appointment |
| Raised | 141/91 – 179/119 | Raised, monitor and inform GP and clinic |
| High***** | 180/120 or more | Significant risk, needs urgent review – update GP and clinic |
Disclaimer – EthVida is not a healthcare provider, we offer awareness in the form of education, signposting and
advocacy for plant-based medicines. Please note, all advice given is based on various healthcare models that
have been proven to support patients with sustainability and backed by Public Health England (PHE).
Nonetheless, you should run any changes to your routine by your GP as they are your primary carer, it is also
important that any other healthcare professionals involved in your care is involved in your goal planning. Don’t
forget they hold your medical records and would be familiar with you; this will help everyone to be on the same
page and will also enable you to plan more realistically and not overestimate your capacity!






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