Every medicine authorised in Spain includes a patient information leaflet with the same structure, set by the AEMPS (the Spanish medicines agency). Knowing that structure turns a dense wall of text into a quick lookup.
The six sections, in order
1. What it is and what it’s used for. Confirms the medicine does what you think it does. Many active substances have several different uses.
2. What you need to know before you take it. The most important section. Covers contraindications, warnings, interactions with other medicines, and use during pregnancy, breastfeeding and driving.
3. How to take it. Dose, interval, duration, and whether to take it with or without food. Also what to do if you miss a dose or take too much.
4. Possible side effects. The section that worries people most and gets misread most often. Keep reading.
5. Storage. Temperature, expiry date, and, for syrups or eye drops, how long the product lasts once opened.
6. Contents of the pack and other information. The full list of inactive ingredients.
How to read the side effects list
The list doesn’t describe what will happen to you — it describes everything that has ever been observed. Effects are ranked by frequency on a fixed scale:
| Category | Frequency |
|---|---|
| Very common | more than 1 in 10 people |
| Common | between 1 in 10 and 1 in 100 |
| Uncommon | between 1 in 100 and 1 in 1,000 |
| Rare | between 1 in 1,000 and 1 in 10,000 |
| Very rare | fewer than 1 in 10,000 |
The effects listed last tend to be the most serious and also the least likely. What’s useful is reading the very common and common ones — those are the ones you might actually notice — and finding the sentence that starts “stop taking this medicine and seek immediate medical attention”, which marks the real warning signs.
Ingredients that must be declared
At the end of the leaflet there’s a list of components with no therapeutic effect. Some must be declared because they cause problems for certain people:
- Lactose — relevant if you’re lactose intolerant
- Gluten (wheat starch) — coeliac disease
- Sucrose, fructose, sorbitol — sugar intolerances and diabetes
- Ethanol — syrups, especially for children
- Sodium — low-salt diets and high blood pressure
- Aspartame — phenylketonuria
If any of these apply to you, this is the first section you should check.
What to always read, even in a hurry
If you only read three things before taking something new:
- The contraindications in section 2 — does any of them apply to you?
- The interactions, if you already take another medicine daily
- The maximum daily dose in section 3
Where to look it up online
The AEMPS runs CIMA, Spain’s official database of authorised medicines. You can search by brand name or active substance and download the up-to-date leaflet and technical data sheet: cima.aemps.es.
It’s the reliable source when you’ve thrown away the box, or when the leaflet in the box is in a different language.
A note on the leaflet and your pharmacist
The leaflet answers the general case; your pharmacist answers your case. If you take several medicines, if you’re pregnant, or if you have a chronic condition, asking at the counter settles in a minute what the leaflet leaves open.
This information is general guidance only. It does not replace a consultation with your doctor or pharmacist. Source: AEMPS — CIMA.