Metyrapone
Metopirone
Revisado por pares por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSLast updated 20 Sept 2024
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Metyrapone will be prescribed for you by a specialist doctor.
You will be told how many capsules to take and when to take them. If you are unsure about this, you should ask your doctor or pharmacist to explain it to you again.
You may feel dizzy or sleepy while you are on metyrapone. If you are a driver, make sure these effects have worn off before you drive.
At a glance
Metyrapone is a medicine used to diagnose or treat Cushing's syndrome, a condition caused by too much cortisol.
It can also treat fluid retention linked to specific kidney, liver, or heart problems.
Take this medicine exactly as your doctor tells you, usually with milk or after food.
Swallow the capsules whole without chewing them.
Common side effects include feeling dizzy, sleepy, or sick.
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About metyrapone
Tipo de medicamento | A medicine which reduces the amount of cortisol and aldosterone produced by the body |
Usado para | The diagnosis or treatment of Cushing's syndrome The treatment of fluid retention associated with some kidney, liver and heart conditions |
También llamado | Metopirone® (USA) |
Disponible como | Cápsulas |
Metyrapone is a medicine which can be used to diagnose síndrome de Cushing. It is also occasionally prescribed to treat Cushing's syndrome. Cushing's syndrome is a condition where the level of a substance, called cortisol, in your body is too high over a long period of time. Cortisol is a hormone which helps your body react in a normal way to stress. It also helps regulate your blood pressure, your immune system and your blood sugar levels. Your body normally keeps the level of cortisol within a certain range so that there is neither too much nor too little. When you produce too much cortisol, a number of symptoms can develop over time although these can be fairly nonspecific, such as putting on weight, muscle weakness and bruising easily. Metyrapone helps prevent the over-production of cortisol and this helps to control these symptoms.
Metyrapone is also used to treat some types of water retention caused by an increased amount of a hormone called aldosterone. This type of water retention can occur if you have a kidney problem, cirrosis hepática, or insuficiencia cardíaca. Water retention occurs when there is a build-up of fluid in your body. It can make your feet or face swollen and puffy.
Before taking metyrapone
Volver al contenidoSome medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start taking metyrapone it is important that your doctor knows:
Si estás embarazada, intentando tener un bebé o amamantando.
If you have been told that you have underactive thyroid, pituitary or adrenal glands.
Si tienes algún problema con el funcionamiento de tu hígado.
If you have any problems with the way your heart works, especially an irregular heartbeat.
If you have been told that you have an imbalance in the levels of salts in your body.
Si tienes presión arterial alta.
Si tienes un trastorno sanguíneo hereditario raro llamado porfiria.
Si está tomando o usando otros medicamentos. Esto incluye cualquier medicamento que esté tomando y que esté disponible para comprar sin receta, así como medicamentos herbales y complementarios.
Si alguna vez has tenido una reacción alérgica a un medicamento.
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How to take metyrapone
Volver al contenidoBefore you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about metyrapone and will provide you with a full list of the side-effects which you could experience from taking it.
Metyrapone will be prescribed for you initially by a specialist doctor in a hospital. Your dose will depend upon the reason why you are taking it, so your doctor will tell you how many capsules to take and when to take them. This information will also be printed on the label of the pack to remind you about what the doctor said. Take the capsules exactly as your doctor tells you to.
Swallow the capsules whole - do not chew them before you swallow.
Take the capsules with a drink of milk or just after eating a meal. This will help prevent you from feeling sick after taking your doses.
Try to get into a habit of taking your doses at the same times of day each day. This will help you to remember to take the capsules regularly.
If you forget to take a dose, take it as soon as you remember. If when you remember, it is almost time to take your next dose then skip the missed dose and take your next dose when it is due. Do not take two doses together to make up for a forgotten dose.
Obteniendo el máximo de tu tratamiento
Volver al contenidoIntenta mantener tus citas regulares con tu médico. Esto es para que tu médico pueda verificar tu progreso.
People with ectopic Cushing's syndrome who take metyrapone may be more prone to getting certain infections. Your doctor will discuss the risks with you and may prescribe preventative antibiotic treatment.
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Can metyrapone cause problems?
Volver al contenidoAlong with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the ones occasionally associated with metyrapone. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine but speak with your doctor or pharmacist if any of the following continue or become troublesome.
Occasional metyrapone side-effects | ¿Qué puedo hacer si experimento esto? |
Sentirse mareado o somnoliento | No conduzca ni utilice herramientas o máquinas mientras esté afectado |
Sentirse mal (náuseas) o estar enfermo (vómitos) | Mantente en alimentos simples - evita comidas ricas o picantes |
Feeling dizzy or light-headed particularly when you stand up | Try getting up or moving more slowly. If you begin to feel faint, sit down for a few minutes to allow the feeling to pass |
Dolor de cabeza | Bebe mucha agua y pide a tu farmacéutico que te recomiende un analgésico adecuado. Si los dolores de cabeza continúan, informa a tu médico |
If you experience any other symptoms which you think may be due to this medicine, please speak with your doctor or pharmacist for further advice.
How to store metyrapone
Volver al contenidoMantenga todos los medicamentos fuera del alcance y la vista de los niños.
Almacenar en un lugar fresco y seco, lejos del calor y la luz directos.
Información importante sobre todos los medicamentos
Volver al contenidoInformación importante sobre todos los medicamentos
Nunca tome más de la dosis prescrita. Si sospecha que usted u otra persona podría haber tomado una sobredosis de este medicamento, acuda al departamento de accidentes y emergencias de su hospital local. Lleve el envase con usted, incluso si está vacío.
Este medicamento es para ti. Nunca lo des a otras personas, incluso si su condición parece ser la misma que la tuya.
If you are having an operation or dental treatment, please tell the person carrying out the treatment which medicines you are taking.
If you buy any medicines, check with a doctor or pharmacist that they are suitable for you to take with your other medicines.
No guardes medicamentos caducados o no deseados. Llévalos a tu farmacia local, que se encargará de desecharlos por ti.
Si tienes alguna pregunta sobre este medicamento, consulta a tu farmacéutico.
Informar efectos secundarios de un medicamento o vacuna
Si experimenta efectos secundarios, puede reportarlos en línea a través de Yellow Card website.

¿Inseguro sobre mezclar medicamentos?
Verifica posibles interacciones entre medicamentos, suplementos y alimentos antes de tomarlos juntos.
Preguntas frecuentes
What is the main purpose of metyrapone, and how does it help with Cushing's syndrome?
Metyrapone is primarily used to diagnose Cushing's syndrome and, in some cases, to treat it. Cushing's syndrome involves persistently high levels of cortisol, a hormone that regulates stress, blood pressure, the immune system, and blood sugar. Metyrapone works by preventing the body from over-producing cortisol, which helps to control symptoms like weight gain, muscle weakness, and easy bruising.
Can metyrapone help with swelling or fluid retention?
Yes, metyrapone can also be used to treat certain types of water retention. This occurs when there's too much of a hormone called aldosterone, leading to a build-up of fluid in the body. This fluid retention can cause symptoms like swollen feet or a puffy face and can be associated with kidney problems, liver cirrhosis, or heart failure.
What should I tell my doctor before starting metyrapone?
Before you start taking metyrapone, it's important to inform your doctor if you are pregnant, trying to conceive, or breastfeeding. You should also mention if you have any issues with your thyroid, pituitary, or adrenal glands, or any problems with your liver or heart, especially an irregular heartbeat. Inform them about any salt imbalance in your body, high blood pressure, or a rare blood disorder called porphyria. Also, provide a complete list of all other medicines you are taking, including over-the-counter, herbal, and complementary medicines, and if you've ever had an allergic reaction to any medicine.
How should I take metyrapone capsules to avoid feeling sick?
To help prevent feeling sick after taking your exact prescribed dose of metyrapone, you should swallow the capsules whole without chewing them. It is recommended to take the capsules with a drink of milk or immediately after eating a meal.
What should I do if I forget to take a dose of metyrapone?
If you forget a dose, take it as soon as you remember. However, if it's nearly time for your next scheduled dose, you should skip the missed dose and just take your next dose when it's due. Do not take two doses at once to make up for the one you missed.
Are there any specific risks of infection linked to metyrapone?
People with ectopic Cushing's syndrome who are taking metyrapone may have an increased risk of developing certain infections. Your doctor will discuss these potential risks with you and might prescribe antibiotics as a preventative measure.
What should I do about common side-effects like dizziness or feeling sick?
If you feel dizzy or sleepy, you should not drive or use tools/machines. If you feel sick or are vomiting, try to eat simple foods and avoid rich or spicy meals. For dizziness or light-headedness when standing up, try getting up more slowly and sit down for a few minutes if you feel faint. For headaches, drink plenty of water and you can ask your pharmacist for a suitable painkiller. If any of these side-effects continue or become bothersome, or if you experience other symptoms you believe are due to metyrapone, speak to your doctor or pharmacist.
How should I store metyrapone?
Metyrapone should be kept out of the reach and sight of children. Store it in a cool, dry place, away from direct heat and light.
Lecturas adicionales y referencias
- Manufacturer's PIL, Metyrapone 250 mg capsules; HRA Pharma UK and Ireland Limited, The electronic Medicines Compendium. Dated June 2022.
- Medicamentos Completos BNF 89ª Edición; Asociación Médica Británica y Sociedad Real de Farmacia de Gran Bretaña, Londres.
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About the authorView full bio

Michael Stewart, MRPharmS
Medicine Leaflet Review Manager – Contractor, Pharmacist
BPharm (Hons), MRPharmS
Michael is a community pharmacist practicing in the Midlands and South Yorkshire with more than 20 years’ experience advising on medicines and medical conditions. He has a strong background in healthcare training, having produced and delivered training courses for pharmacy teams and staff of residential care settings, including nurses. He has also contributed to pharmacy advisory boards for the management of low acuity conditions in the community.
About the reviewer

Sid Dajani
Sultan Dajani qualified at the London School of Pharmacy in 1994 and became the youngest elected member of the Royal Pharmaceutical Society council since its founding in 1842.
Historial del artículo
La información en esta página está escrita y revisada por pares por clínicos calificados.
Next review due: 25 Sept 2027
20 Sept 2024 | Última versión

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