Report a side effect of cannabis products

Updated 25 September 2018
Temabillede om medicinsk cannabis med tekst

Users of medicinal cannabis (cannabis products) and relatives can report side effects to these products by using our Danish e-form.

Please read the text below if you want to report a suspected side effect to medicinal cannabis (cannabis product). Then click the link at the bottom of the page to access the reporting form.

Getting started

Before you fill in the e-form, there are a few things you should know.

We use the details you provide to build a clear picture of the side effect you or someone else has experienced. It is a great help if you complete all fields as precisely as you can.

You will find it helpful to have the pack of medicinal cannabis (cannabis product) with you when you fill in the details about the product.

It takes about ten minutes to complete the e-form.

If you have questions along the way or cannot use the e-form to report the side effect, please call us on +45 4488 9595.

In some cases, we may need to obtain additional information on the report. If so, we will contact you to obtain the necessary information.

Contact your doctor if you or your relative experience a side effect

You should always contact your doctor if you or your relative experience side effects. Your doctor can assess whether the side effect should lead to a change in treatment.

What is a side effect?

A side effect (sometimes called an adverse reaction) is an unwanted effect caused by medicinal cannabis (cannabis product).

A side effect could be:

  • Sleepiness
  • Dizziness

No systematic studies have been made of the type of side effects caused by medicinal cannabis or how common they are.

The Danish Medicines Agency has prepared guidelines for doctors on the treatment of patients with medicinal cannabis comprised by the pilot programme (in Danish). The guidelines include information about side effects.

Information we must provide when personal data are collected

When you make a report about a suspected side effect, we receive personal data about you, which we register and process.

According to article 13 of the General Data Protection Regulation, we must provide you with a number of details. The details we must give you are:

Expand all

We are the data controller - how to contact us

The Danish Medicines Agency is the data controller in respect of the processing of the personal data we have received from you. Please find our contact details below.

Danish Medicines Agency

Axel Heides Gade 1
2300 Copenhagen S

CVR no.: 37052485

Telephone: +45 44 88 95 95


Contact details of the Data Protection Officer

If you have questions about our processing of your data, we advise you to contact our data protection officer.

Our data protection officer, Troels Mogensen, can be contacted in the following ways:

Danish Medicines Agency
Axel Heides Gade 1
2300 Copenhagen S
Att. ”Data Protection Officer"

The purposes and the legal basis of the processing of your personal data

We process your personal data for the following purposes:

  • The Danish Medicines Agency records all suspected side effects to cannabis products in our database of side effects, and we use data about side effects to investigate if there are new or changed product risks.
  • The side effect data will be used for our monitoring and evaluation of the four-year medicinal cannabis pilot programme.

The legal basis for our processing of your personal data follows from:

Part VIII of Danish Act no. 1668 of 26 December 2017 on a Medicinal Cannabis Pilot Programme, and Danish Executive Order no. 1732 of 26 December 2017 on the Reporting of Adverse Reactions from Medicinal Cannabis and Processing of Adverse Reaction Reports.

Categories of personal data

We process the following categories of personal data about you:

Health data and basic information, e.g. name, initials, CPR (civil registration) number.

Recipients of categories of recipients

We disclose or transfer your personal data to the following recipients:

The Danish Medicines Agency's database of side effects is a database established and operated by the British Medicines and Healthcare products Regulatory Agency (MHRA). The Danish Medicines Agency thus uses the MHRA as a data processor.

Transfer to recipients in third countries, including international organisations

Your personal data is transferred to recipients outside the EU and the EEA.

The Danish Medicines Agency's data processor, MHRA, uses a subcontractor, Accenture India, in India.

The Danish Data Protection Agency has authorised the specific transfer of data to a third country in its authorisation dated 8 October 2010, cf. article 46(5) of the General Data Protection Regulation. You can request a copy of the authorisation granted by the Danish Data Protection Agency by contacting us.

Storing of your personal data

At present, we cannot say for how long we will be storing your personal data, but it will definitely be stored throughout the duration of the four-year period of the medicinal cannabis pilot programme (1 January 2018 – 31 December 2021). When it is to be decided for how long your data will be stored after the four-year period, the following will be emphasised:

– that your data are stored for as long as it is relevant for reasons of patient safety to identify you to pose follow-up questions. After that, the patient details will be anonymised.

Your rights

The General Data Protection Regulation gives you a number of rights in respect of our processing of your personal data. 

If you want to make use of your rights, you need to contact us.

Right to see your data (right of access)

You have the right to access the information we process about you as well as other information.

Right to rectification (correction)

You have the right to have incorrect information about you corrected.

Right to erasure

In exceptional cases, you have the right to have information about you erased before the time we would generally erase the information.

Right to restriction of processing

In certain cases, you have the right to have the processing of your data restricted. If you do have the right to restriction of processing, then we are only allowed to process your data, with the exception of storage, with your consent or for the establishment, exercise or defence of legal claims or for the protection of the rights of another person or for reasons of important public interest.

Right to object

In certain cases, you have the right to object to our otherwise legal processing of your personal data.

You can read more about your rights in the Danish Data Protection Agency's guidelines on the rights of data subjects. The guidelines are available in Danish at the website of the Danish Data Protection Agency:

Lodging a complaint with the Danish Data Protection Agency

You have the right to lodge a complaint with the Danish Data Protection Agency if you are displeased with the way in which we process your personal data. The contact details of the Danish Data Protection Agency are available at

Rweporting form (in Danish)

Have a question about medicinal cannabis?

If you have a question about cannabis, you are welcome to contact our Information Centre on +45 44 88 95 95 or send an email to

You can also post a question on our Facebook page