Minoxidil para la presión arterial alta
Loniten
Revisado por pares por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSÚltima actualización 3 Sept 2024
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Minoxidil is used to control high blood pressure. It will be prescribed by a specialist.
Treatment with minoxidil is usually long-term.
Minoxidil can make your heart beat more quickly and cause your body to keep more fluid than normal. You will be prescribed other medicines to help control this. Minoxidil can also cause fine facial hair to darken and become thicker in texture.
De un vistazo
Minoxidil is a medicine for very high blood pressure that other treatments have not controlled.
It is prescribed by a specialist doctor and works by widening blood vessels.
You will take other medicines with minoxidil to manage potential side-effects.
Tell your doctor if you have kidney problems, heart conditions, or are pregnant or breastfeeding.
Common side-effects include changes in hair and a fast heartbeat.
Always take minoxidil exactly as your doctor tells you.
About minoxidil
Tipo de medicamento | Un medicamento antihipertensivo vasodilatador |
Usado para | The treatment of very high blood pressure |
También llamado | Loniten® |
Disponible como | Comprimidos |
Although many people with presión arterial alta (hipertensión) do not feel unwell, it is still important that high blood pressure is treated. If left untreated, high blood pressure is a risk factor that can increase your chance of developing heart disease, a stroke and other serious conditions. Minoxidil will be prescribed for you if other medicines have not been sufficient to control your high blood pressure. It will be prescribed for you by a specialist doctor.
Minoxidil works by relaxing the muscles in the walls of your blood vessels. This means that your blood vessels widen, which reduces your blood pressure and allows blood and oxygen to circulate more freely around your body. You will also be prescribed other medicines to take alongside minoxidil. These are to help regulate the amount of water and salt in your body and also to help control your heart rate because these can be increased by taking minoxidil.
Minoxidil is also used in scalp applications for the treatment of hair loss. For more information about this please see our other leaflets on minoxidil scalp preparations for men y for women.
Before taking minoxidil tablets
Some 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 minoxidil it is important that your doctor knows:
Si tienes algún problema con el funcionamiento de tus riñones.
If you have angina chest pain, or if you have recently had a heart attack.
Si tienes un trastorno sanguíneo hereditario raro llamado porfiria.
If you have been told you have a tumour known as phaeochromocytoma.
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.
If you are pregnant or breastfeeding. Minoxidil is generally unsuitable for women; however, if it has been prescribed for you and you are pregnant or breastfeeding, you must make sure your doctor knows about this.
How to take minoxidil tablets
Before you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about minoxidil and will provide you with a full list of the side-effects which you could experience from taking the tablets.
Take minoxidil exactly as your doctor tells you to. Your doctor will tell you how many tablets to take each day, and your dose will also be printed on the label of the pack to remind you about what the doctor said to you. It is usual to take minoxidil tablets either once or twice every day.
Try to take your doses at similar times of day each day, as this will help you to remember to take them regularly. There are three strengths of tablet available: 2.5 mg, 5 mg, and 10 mg. It is usual to take a low-strength tablet to begin with and for this to increase as you go on. Increasing your dose gradually allows your doctor to make sure that you have the dose that best helps your condition but also keeps unwanted side-effects to a minimum.
Swallow the tablet whole with a drink of water. You can take minoxidil either before or after a meal.
If you forget to take a dose at your usual time, take it as soon as you remember unless your next dose is due. If your next dose is due then take the dose which is due but leave out the forgotten one. Do not take two doses together to make up for a missed dose.
Obteniendo el máximo de tu tratamiento
Try to keep your regular appointments with your doctor. This is so your doctor can check on your progress. You will need to have regular blood pressure measurements and also some heart and blood tests from time to time.
Your doctor will discuss with you the possibility of unwanted side-effects of treatment, such as your fine body hair becoming darker and thicker. This may be noticed about a month or so after starting treatment with minoxidil. Because of this effect, minoxidil is generally unsuitable for women but if it has been prescribed for you and you could get pregnant, you should ask your doctor about what methods of contraception are suitable for you. This is because you should avoid becoming pregnant while you are on minoxidil.
Your doctor will advise you on what lifestyle changes you can make to help your condition. These may include losing weight if you are overweight, taking regular physical activity, eating a healthy diet, cutting back if you drink a lot of alcohol, stopping smoking, and reducing the amount of salt in your meals and caffeine in your drinks. It is important that you follow any advice you are given.
If you are due to have an operation or dental treatment, tell the person carrying out the treatment that you are taking minoxidil. This is because some anaesthetics can affect your blood pressure.
If you buy any medicines, check with a pharmacist that they are suitable for you to take. This is because some medicines (particularly some anti-inflammatory painkillers) can interfere with minoxidil.
Treatment with minoxidil is usually long-term unless you experience an adverse effect. You should continue to take the tablets regularly unless you are advised otherwise by your doctor.
Can minoxidil tablets cause problems?
Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains the most common ones associated with minoxidil. 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.
Very common minoxidil side-effects (these affect more than 1 in 10 people) | ¿Qué puedo hacer si experimento esto? |
Changes in your hair colour, thickness or texture | Si esto se vuelve problemático, hable con su médico |
A fast heartbeat and other heart problems | If you are concerned about this, speak with your doctor |
Common minoxidil side-effects (these affect fewer than 1 in 10 people) | ¿Qué puedo hacer si experimento esto? |
Your body may retain more fluid than normal | If you notice you are putting on weight or if your ankles or feet become swollen, let your doctor know |
Si experimenta cualquier otro síntoma que crea que puede deberse a las tabletas, por favor hable con su médico o farmacéutico para obtener más consejos.
How to store minoxidil
Mantenga 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
Información importante sobre todos los medicamentos
Nunca tome más de la dosis prescrita. Si sospecha que usted u otra persona podría haber tenido 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.
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 Sitio web de Yellow Card.

¿Inseguro sobre mezclar medicamentos?
Verifica posibles interacciones entre medicamentos, suplementos y alimentos antes de tomarlos juntos.
Preguntas frecuentes
Does minoxidil lower blood pressure?
Yes, minoxidil works by relaxing the muscles in the walls of your blood vessels. This wider opening reduces your blood pressure, allowing blood and oxygen to flow more freely around your body. It is prescribed for very high blood pressure that hasn't been controlled by other medications.
Is minoxidil still used for blood pressure?
Yes, minoxidil is still used for the treatment of very high blood pressure, particularly when other medicines have not been effective enough. It is prescribed by a specialist doctor.
Can I use minoxidil if I have any kidney problems?
If you have any problems with the way your kidneys work, it's important to inform your doctor before starting minoxidil. Your doctor needs to be aware of this to determine if minoxidil is suitable for you.
What should I do if I am prescribed minoxidil and recently had a heart attack?
If you have recently had a heart attack, you must inform your doctor before you start taking minoxidil. This information is important for your doctor to assess if the medicine is appropriate for your condition.
Why is minoxidil generally unsuitable for women, especially if I can get pregnant?
Minoxidil can cause changes in body hair, making it darker and thicker, which is why it's generally considered unsuitable for women. If it has been prescribed to you and there's a possibility of becoming pregnant, you should discuss suitable contraception methods with your doctor, as pregnancy should be avoided while on minoxidil.
Can I drink alcohol while taking minoxidil?
Your doctor may advise you on lifestyle changes to help your condition, which could include cutting back on alcohol if you drink a lot. It's always best to follow your doctor's specific advice regarding alcohol consumption while on minoxidil.
What changes might I notice in my hair while taking minoxidil?
You may notice changes in your hair colour, thickness, or texture. This can include fine body hair becoming darker and thicker, usually about a month or so after starting treatment. If these changes become troublesome, you should speak with your doctor.
Lecturas adicionales y referencias
- Manufacturer's PIL, Loniten® Tablets 2.5 mg, 5 mg and 10 mg; Pfizer Limited, The electronic Medicines Compendium. Dated January 2022.
- Medicamentos Completos BNF 89ª Edición; Asociación Médica Británica y Sociedad Real de Farmacia de Gran Bretaña, Londres.
Sobre el autorVer biografía completa

Michael Stewart, MRPharmS
Gerente de Revisión de Folletos de Medicamentos – Contratista, Farmacéutico
BPharm (Hons), MRPharmS
Michael es un farmacéutico comunitario que ejerce en Midlands y South Yorkshire con más de 20 años de experiencia asesorando sobre medicamentos y condiciones médicas. Tiene una sólida formación en capacitación en atención médica, habiendo producido e impartido cursos de formación para equipos de farmacia y personal de entornos de atención residencial, incluidas enfermeras. También ha contribuido a juntas asesoras de farmacia para la gestión de condiciones de baja gravedad en la comunidad.
Acerca del revisor

Sid Dajani
Sultan Dajani se graduó en la Escuela de Farmacia de Londres en 1994 y se convirtió en el miembro más joven elegido para el consejo de la Sociedad Real de Farmacia desde su fundación en 1842.
Historial del artículo
La información en esta página está escrita y revisada por pares por clínicos calificados.
Artículo también disponible en Inglés, Alemán, Español, Francés, Italiano, Portugués, Hindi, Hebreo, Árabe, y Sueco.
Próxima revisión: 3 de septiembre de 2027
3 Sept 2024 | Última versión

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