Medically reviewed by Jessica Swirble, PharmD
Last updated on April 18, 2025
Drug Information | Side Effects | Use & Dosage | Request an Online Prescription
Minoxidil is a prescription medication used to treat high blood pressure. This drug relaxes blood vessels in the body to ease blood flow to and from the heart, helping to lower blood pressure over time.
Minoxidil is used to treat high blood pressure (hypertension). It may be used alone or in conjunction with other therapies to lower blood pressure and prevent further complications, such as heart disease, heart attack, and stroke.
Minoxidil belongs to a class of medications known as vasodilators. These drugs work by relaxing the walls of blood vessels, widening pathways for blood and oxygen to flow to the heart. Over time, this action helps to lower blood pressure.
It is important to note that this medication does not cure high blood pressure, though it does help control it. Your blood pressure treatment may include prescriptions for other medications and lifestyle adjustments such as dietary changes and increased exercise.
Minoxidil is available as an oral tablet.
The dosage and frequency of use depend on the condition being treated, its severity, and how you respond to the medication.
Follow your healthcare provider's instructions regarding dosage and schedule. Do not exceed the prescribed dose or frequency of use without consulting your provider.
Minoxidil is used to manage high blood pressure. The effects can be noticeable within a few days, but it may take several weeks to achieve optimal control of blood pressure.
Continue using minoxidil as prescribed, even if you start feeling better. Regular use according to your prescription is crucial for the management of symptoms.
While minoxidil is primarily used for treating high blood pressure, healthcare providers may prescribe it off-label for other conditions, such as certain types of hair loss in specific situations.
Discuss any alternative uses of minoxidil with your healthcare provider.
Minoxidil is available in the following dosage forms:
Minoxidil is a prescription medication. To obtain it, you must have a valid prescription from a licensed healthcare provider.
The use of minoxidil can lead to various side effects in some individuals.
Common mild side effects of minoxidil use include:
More severe side effects of minoxidil use can include:
If you experience any severe or concerning side effects while taking minoxidil, contact your healthcare provider right away.
Inform your healthcare provider about any existing medical conditions, allergies, or other medications you are taking before starting treatment with minoxidil. This includes prescription drugs, over-the-counter medications, and dietary supplements, as they may interact with minoxidil.
Tell your provider if you are taking these medications or supplements:
You should also mention medical conditions such as:
If you are pregnant, planning to become pregnant, or breastfeeding, discuss the potential risks and benefits of using minoxidil with your healthcare provider.
Take minoxidil exactly as prescribed by your healthcare provider. Do not exceed the recommended dose or duration of treatment.
Your provider may direct you to a low-sodium diet while taking minoxidil.
It's important to complete the full course of treatment, even if you feel better, to ensure the medication's effectiveness in managing your condition.
In case of a minoxidil overdose, seek medical attention immediately. Symptoms of overdose may include seizures, trouble breathing, or fainting. If you suspect an overdose, contact the poison control helpline at 1-800-222-1222 or call emergency services.
Minoxidil is available in the following forms:
The typical starting dose of minoxidil varies depending on the condition being treated, the severity of symptoms, and individual patient factors. It is crucial to follow your healthcare provider's instructions regarding dosage and administration.
Minoxidil is usually not the first choice when treating high blood pressure. Minoxidil is usually used for hard-to-treat high blood pressure that requires multiple medications.
For high blood pressure:
The dosage may be adjusted based on the response and tolerance to the medication. Your healthcare provider will determine the most appropriate dose based on your medical history and your response to the medication.
Minoxidil should be taken as prescribed by your healthcare provider. Do not exceed the recommended dose or duration of treatment without consulting your provider.
If you have any questions about your dosage or need adjustments, contact your healthcare provider for guidance. If you want to talk to a provider right away, consider scheduling an online doctor appointment through a telehealth platform like Sesame.
If you miss a dose of minoxidil, take it as soon as you remember unless it is close to the time for your next scheduled dose. In that case, skip the missed dose and continue your regular dosing schedule. Do not double the dose to make up for a missed one.
Take minoxidil around the same time every day to maintain a consistent amount of medication in your body.
Continue taking minoxidil as prescribed by your healthcare provider, even if you start feeling better. It's important to keep taking the medication as directed to manage your condition effectively.
Do not suddenly stop taking minoxidil, as this can cause your blood pressure to go back up.
If you have any concerns or questions about your medication, discuss them with your healthcare provider for medical advice and recommendations.
Store minoxidil according to the instructions provided by your healthcare provider or pharmacist. Keep it at room temperature, away from light and moisture. Ensure the container is tightly closed and out of reach of children.
Do not use expired medication or medications that appear damaged or discolored. If you have any questions about storage, consult your healthcare provider or pharmacist for guidance.