Keeping a Cannabis Diary: A Template for Use, Effects and Side Effects

A cannabis diary template for recording products, amounts, effects and unwanted symptoms. Includes a worked example and advice for appointments in Switzerland.

Which pack was it? When did you use it? And were you already tired beforehand? Memory alone often leaves those questions unanswered. A cannabis diary keeps a record of what actually happened. This guide gives you a template to copy, a completed example and a way to organise observations for yourself or a conversation with a doctor or pharmacist.

What a cannabis diary can help with

A useful entry does not have to be long. It should let you reconstruct a particular situation: the product, time and how you felt. That can help after a change of pack or when several events have become mixed up in your memory. You do not need a specialist app or club membership.

During medical treatment, a summary can help you prepare for an appointment. For other adults, it may help bring consumption days and personal patterns into focus. The purpose is not to chase a stronger effect. If your use worries you, the notes can also provide a starting point for a conversation with a professional.

Identify the product, batch and label information

Write down the full product name and batch or lot number if available. A strain name alone does not always identify a particular preparation. For prescribed medicines, include the formulation. You can keep a photograph of the packaging with the relevant entry without uploading the picture publicly.

Copy THC and CBD information exactly as it appears on the label, including units. Percentages, mg/ml and mg per item are different descriptions. State whether a value comes from the label or a laboratory report matched to the batch. If information is missing, write ‘not stated’ rather than borrowing a figure from a similar pack or strain name.

Match the batch to the laboratory report

Separate timing, method and observations

Record the time you actually used the product and the method: swallowed oil, a capsule or a vaporizer, for example. Writing only ‘cannabis’ leaves too much unexplained. A further use should have its own time recorded; do not silently fold it into the first entry.

Describe how you felt beforehand if possible, then add later observations with their times. For a particular symptom, you can use a consistent personal scale, such as 0 for none and 10 for the worst imaginable discomfort. These are subjective ratings, not objective measurements. Include practical observations too, such as difficulty reading or unusual sleepiness.

Understand differences between methods of use

Record amounts without inventing precision

The amount of product used is not the same as the amount of active substance. Start with the product amount you actually know and its unit. A percentage on flower does not tell you how much THC your body absorbed. A number of puffs is not a reliable measurement in milligrams either.

If you did not measure the amount, write ‘amount not recorded’. Do not reconstruct a seemingly precise dose afterwards. For a medicine, you can distinguish prescribed use from what actually happened; discuss any differences with the treating professional. This template deliberately contains no dosing schedule.

The template to copy

Copy this block into your private notes or write the fields in a notebook. Start a new entry for each use and add a time to every follow-up observation. Mark information that is unknown or not applicable.

Date and time of use:
Product / formulation:
Batch or lot number, if available:
THC / CBD as labelled, including units:
Actual product amount used, including unit:
Method of use:
How I felt beforehand, with time:
Later observations, each with a time:
Unwanted effects / new symptoms:
Other medicines and relevant times taken:
Relevant circumstances (sleep, meal, alcohol, etc.):
Unknown information / uncertain recollections:
Questions for the doctor or pharmacist:

A completed example: missing information stays visible

This example is entirely fictional. It demonstrates record-keeping, not recommended use or evidence of effectiveness. The missing amount is not filled in with an invented figure.

A change from 5 to 4 does not establish pain relief caused by cannabis. This entry alone cannot attribute the increased tiredness to a single cause either.

Look for patterns without treating them as proof

A symptom can change after use without cannabis being the only explanation. Sleep, meals, stress, activity, alcohol or other medicines may also matter. Record relevant circumstances rather than trying to archive your entire day. ‘Four hours of sleep’ is more informative than ‘bad day’.

Compare similar situations and keep the same scale. Mark gaps, product changes and uncertain recollections. A blank field does not automatically mean no use or no symptoms. Do not use the table to justify increasing a dose, declare a combination safe or establish fitness to drive.

Prepare for a doctor or pharmacy appointment in Switzerland

During treatment with cannabis medicines, product details, actual use, other medication and unwanted effects are useful points to discuss. Bring an up-to-date medication list, including non-prescription products. Describe what you observed rather than diagnosing an interaction yourself.

Choose a few clear examples and prepare your main questions: what has changed? Which symptoms are new? What should you record before the next appointment? Do not change prescribed treatment on your own because of the table. Your private diary replaces neither the clinical record nor the treating professionals’ documentation and reporting obligations.

Understand possible cannabis interactions

Understand medical access through prescriptions and pharmacies

Protect your personal notes

A diary can contain sensitive information about health, medicines and cannabis use. Include only what is needed for your purpose. An AHV number, identity-document photograph or other people’s names will not usually be necessary. Keep a paper notebook somewhere protected; restrict access to digital notes.

If you use an app or cloud document, check sharing settings, automatic synchronisation and data-export options. Do not simply send a publicly accessible link. A focused extract may be enough for an appointment; ask the practice or pharmacy which communication channel to use. A club account does not automatically make your notes part of a medical record.

Keep the routine manageable

Start with the essential fields and add only what helps answer your question. A short entry made soon afterwards is generally easier to interpret than a long reconstruction at the end of the week. If you want to record days without use, write ‘no use’ explicitly so they are distinguishable from missing entries.

For medical treatment, agree with the professional which observations and period would be useful. Record difficulties honestly even when they do not match your expectations. Severe or rapidly worsening symptoms require medical help rather than waiting to collect more entries. The diary should support assessment, not delay it.

Editorial check: 13 October 2026. General record-keeping guidance for adults, not personalised medical advice or a dosing schedule. A diary does not establish that a particular use is lawful.