Fluidasa (Mepifiline Cough Syrup) in Spain: Uses
Medically Reviewed by Dr. Pedro Yelamo Vera, MD
Licensed Physician No. 484814280 · Official Medical College of Bizkaia (Spain)Last reviewed: 29 October 2026
Fluidasa is mepifiline cough syrup, a Spanish prescription medicine for bronchitis. What it does, why it is not a mucolytic and who should avoid it.
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Fluidasa is a Spanish prescription medicine for bronchitis. Its active ingredient is mepifiline (also spelled mepifylline). The mepifiline cough syrup is the best-known form, but there are also drops and capsules. It opens up tight airways and blocks histamine. It is not a mucolytic and does not thin phlegm.
- Fluidasa (mepifiline) treats tight, narrowed airways in short-term and long-term bronchitis.
- It needs a prescription in Spain. The syrup, drops and capsules are on sale.
- It often makes people sleepy. Avoid alcohol and do not drive if you feel drowsy.
- It is not sold in the UK or US. There is no direct twin there.
Dr. Pedro Yelamo Vera is a GP licensed in Spain (Colegiado No. 484814280).
For a medical emergency, call 112 or go to the nearest local emergency department. Do not wait for a video consultation or an online reply.
What is Fluidasa used for?
The Spanish product leaflet gives one use: to treat narrowing of the airways in people with bronchitis. That covers a chest infection that comes and goes, and long-term bronchitis. When the airways tighten, you may cough, wheeze and feel short of breath.
Mepifiline joins two medicines in one molecule:
- A xanthine, from the same family as theophylline. It relaxes the muscle around the airways, so they open up.
- Mepyramine, an older antihistamine. It blocks histamine, one of the signals behind swelling in the airways.
Fluidasa comes as an oral solution (the syrup, solución oral), drops (gotas orales) and hard capsules (cápsulas duras). Packs come in different strengths. The doctor or the leaflet sets how much, and the amount for a child depends on their weight.
Is Fluidasa a mucolytic or an expectorant?
No. People often ask for it as a cough syrup to loosen mucus, but that is not what it does. These are the three kinds of cough medicine you will meet in a Spanish pharmacy:
- Mucolytics make phlegm thinner, so it is easier to cough up. Acetylcysteine and carbocisteine are examples.
- Expectorants help you bring phlegm up. Guaifenesin is the common one.
- Bronchodilators open tight airways. Fluidasa belongs here, with an added antihistamine.
So Fluidasa suits a cough with wheeze or a tight chest. It does not suit a dry tickly cough from a cold. We explain the mucolytics in our guides to Pectox Lisina (carbocisteine) and Fluimucil (acetylcysteine).
Is there a UK or US version of Fluidasa?
No. Mepifiline is not sold in the UK or the US. The UK medicines database has no product with it. These are the closest familiar types. They are not the same medicine and are not swapped one for another.
| Name | What it is | Where |
|---|---|---|
| Fluidasa | Mepifiline: xanthine bronchodilator plus antihistamine | Spain (prescription) |
| Theophylline | Xanthine bronchodilator on its own | Spain, UK, US (prescription) |
| Salbutamol inhaler (albuterol in the US) | Reliever inhaler that opens the airways | Spain, UK, US (prescription) |
| Chlorphenamine (Piriton) | Older, drowsy antihistamine | UK |
| Carbocisteine, acetylcysteine | Mucolytics that thin phlegm | Spain, UK |
Do you need a prescription for Fluidasa in Spain?
Yes. Every Fluidasa product is listed as medicamento sujeto a prescripción médica on the AEMPS CIMA database. The syrup, the drops and the capsules are on sale. The injection is still listed but is not on sale. The pharmacy needs a valid prescription from a doctor. Our guide to which medicines need a prescription in Spain explains how this works.
Chesty cough, wheeze or bronchitis that is not settling?
You can book a video visit with a GP licensed in Spain, in English or Spanish. He asks about your breathing and tells you what kind of treatment, if any, fits.
Who should not take Fluidasa?
The leaflet says not to take it if you have:
- An allergy to mepifiline or to other antihistamines.
- Liver disease.
- A blocked bladder, an enlarged prostate that causes symptoms, or trouble passing urine.
- Narrow-angle glaucoma.
- Fructose intolerance, for the syrup, which contains sorbitol.
It is not advised for newborns or babies born early. For babies, the leaflet points to the drops rather than the syrup. It is not advised in pregnancy or while breastfeeding. Older people are more likely to get dizzy, confused, dry-mouthed or unable to pass urine.
Can you drink alcohol or drive on Fluidasa?
Avoid alcohol. It makes the drowsiness stronger. Sleepiness is the most common side effect, so do not drive or use machines if you feel slow or sleepy. Tell the doctor if you take antidepressants (including MAOIs or tricyclics), or medicines for bladder or gut spasms. Stop it three days before an allergy skin test, as it can hide the result.
Side effects and cough red flags
Sleepiness is very common. Other common effects are blurred vision, confusion, dizziness, dry mouth, a fast heartbeat, ringing in the ears, a rash, trouble passing urine and stomach ache. Tell the doctor if any of these is strong or does not go away.
See a doctor if:
- Your cough lasts more than three weeks.
- You have a high fever, or you feel worse after starting to get better.
- You lose weight without trying, or you have a weak immune system.
- A baby or young child has a cough with fever, fast breathing or poor feeding.
Call 112 if you cough up blood, struggle to breathe, have chest pain, or your lips or face turn blue or grey. A child who is working hard to breathe also needs 112.
Our pages on bronchitis and colds explain what a doctor checks.
Talking it through with a doctor by video
Dr. Yelamo is a GP licensed in Spain. He sees adults, children and pregnant patients by video, every day from 07:30 to 20:30 (Spain time). In the visit he will:
- Ask how long the cough has lasted, and about phlegm, wheeze and fever.
- Check for warning signs that need a chest exam, an X-ray or an in-person visit.
- Explain whether rest and fluids, an inhaler, a mucolytic or another step fits best.
- Check how your other medicines and health problems fit with any treatment.
He does not promise any test or prescription before the visit. Where clinically appropriate, following a genuine evaluation. Treatment and prescriptions are issued solely at the doctor's discretion based on evidence-based clinical guidelines.
A prescription is never guaranteed: it is issued only where clinically appropriate after a genuine evaluation, as a private electronic prescription under Spanish law. This service is for urgent, non-emergency care. In an emergency, call 112.
See how the Urgent Care video visit works. It lasts 15 minutes and costs €50.
This guide is general information. It does not replace the package leaflet or the advice of your doctor or pharmacist.
Frequently asked questions
What is Fluidasa?
A Spanish prescription medicine with mepifiline. It opens tight airways and blocks histamine in people with bronchitis. It comes as a syrup, drops and capsules.
Is Fluidasa a cough syrup that loosens mucus?
No. It is a bronchodilator with an antihistamine, not a mucolytic or an expectorant. It does not thin phlegm.
Can I buy Fluidasa without a prescription in Spain?
No. Every Fluidasa product needs a doctor's prescription in Spain, according to the AEMPS CIMA database.
Does Fluidasa make you sleepy?
Yes, often. Sleepiness is its most common side effect. Avoid alcohol and do not drive if you feel drowsy.
Can children take Fluidasa?
A doctor decides, and the amount depends on the child's weight. It is not advised for newborns or babies born early.
When is a cough an emergency?
Call 112 if you cough up blood, struggle to breathe, have chest pain or turn blue. See a doctor for a cough over three weeks.
Sources
- AEMPS CIMA: Fluidasa oral solution package leaflet
- AEMPS CIMA: Fluidasa capsules package leaflet
- MedlinePlus: Acute bronchitis
- NHS: Cough
Related guides
Medical Citations & Sources
This content is written and reviewed by a licensed physician with reference to the following official health authorities.
