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Myambutol (Generic Ethambutol)

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Why is this medication prescribed?

Myambutol is a brand name for the generic drug ethambutol. It is primarily prescribed for the treatment of tuberculosis (TB) in combination with other anti-TB medications. Ethambutol is an antibiotic that works by inhibiting the growth of the bacteria that cause tuberculosis. It is an essential component of combination therapy to effectively treat TB and prevent the development of drug-resistant strains.

How should this medicine be used?

Here are some key points on how Myambutol should be used:

  • Prescription: Myambutol is available only by prescription, and it should be taken exactly as directed by your healthcare provider.
  • Dosage: The dosage of Myambutol may vary depending on your age, weight, the severity of the TB infection, and other factors. Your doctor will determine the appropriate dose for you.
  • Combination Therapy: Myambutol is typically used in combination with other anti-TB drugs, such as isoniazid, rifampin, and pyrazinamide. This combination therapy is essential to effectively treat TB and prevent resistance.
  • Duration: The duration of treatment with Myambutol and other anti-TB drugs is usually quite long, often lasting several months to ensure the complete eradication of the TB bacteria.
  • Take as Directed: It’s crucial to take Myambutol exactly as prescribed by your doctor. Do not skip doses, and do not stop taking the medication early, even if you start feeling better. Completing the full course of treatment is essential to prevent the development of drug-resistant TB.
  • Food and Drink: You can take Myambutol with or without food. However, if you experience stomach upset, taking it with food may help.
  • Monitoring: While taking Myambutol, your healthcare provider may perform regular monitoring of your liver function and vision, as the medication can have side effects related to these areas.
  • Side Effects: Common side effects of Myambutol may include vision changes (such as blurred vision or difficulty distinguishing between colors), gastrointestinal upset, and rash. If you experience any side effects, notify your doctor promptly.
  • Vision Monitoring: Regular eye examinations are essential while on Myambutol, as it can cause visual disturbances. If you notice any vision changes, contact your healthcare provider immediately.
  • Drug Interactions: Inform your doctor of all other medications you are taking to check for potential interactions, as Myambutol may interact with other drugs.

It’s important to follow your healthcare provider’s guidance closely when taking Myambutol or any other medication. TB treatment requires strict adherence to the prescribed regimen to ensure a successful outcome and minimize the risk of drug resistance. If you have any concerns or questions about your TB treatment, be sure to discuss them with your healthcare provider.

Other uses for this medicine

Myambutol is primarily used for the treatment of TB, and its use for other conditions is limited. It is not typically prescribed for conditions other than TB. Using Myambutol for purposes other than what it’s prescribed for is not recommended, as it may not be effective and can lead to antibiotic resistance.

What special precautions should I follow?

As for special precautions when using Myambutol, here are some important considerations:

  • Allergies: Inform your healthcare provider if you are allergic to ethambutol or any other medications. This information is crucial to avoid potential allergic reactions.
  • Vision Monitoring: Regular monitoring of your vision is essential while taking Myambutol, as this medication can cause visual disturbances. Be sure to report any changes in vision, such as blurred vision, difficulty distinguishing between colors, or any other eye-related issues, to your healthcare provider promptly.
  • Liver Function: Your healthcare provider may monitor your liver function while you are taking Myambutol. Report any signs of liver problems, such as jaundice (yellowing of the skin or eyes) or abdominal pain, to your doctor.
  • Kidney Function: Ethambutol is primarily excreted by the kidneys. If you have kidney problems, your healthcare provider may need to adjust your dosage accordingly.
  • Pregnancy and Breastfeeding: Inform your doctor if you are pregnant, planning to become pregnant, or breastfeeding, as the safety of Myambutol during pregnancy and breastfeeding is not well established. Your healthcare provider will weigh the potential risks and benefits of the medication in such situations.
  • Drug Interactions: Make sure to inform your healthcare provider about all other medications, supplements, or herbal products you are taking, as Myambutol may interact with certain drugs.
  • Complete the Course: It’s crucial to complete the full course of Myambutol as prescribed by your healthcare provider, even if you start feeling better. Stopping treatment prematurely can lead to the development of drug-resistant TB or other infections.

Always follow your doctor’s instructions and guidance when taking Myambutol, and do not hesitate to discuss any questions or concerns you may have about the medication or its potential side effects. Your healthcare provider will tailor your treatment plan to your specific needs and monitor your progress throughout the course of therapy.

What special dietary instructions should I follow?

There are no specific dietary restrictions associated with Myambutol. You can generally take it with or without food. However, it’s essential to maintain a balanced and nutritious diet to support your overall health during TB treatment. Make sure to discuss any dietary concerns with your healthcare provider.

What should I do if I forget a dose?

If you forget to take a dose of Myambutol, follow these steps:

  • Take It as Soon as You Remember: If you realize you missed a dose, take it as soon as you remember. If it’s close to the time for your next scheduled dose, skip the missed dose and continue with your regular dosing schedule.
  • Do Not Double Dose: Do not take a double dose to make up for the missed one. Taking more than the prescribed amount can increase the risk of side effects without providing any additional benefit.
  • Notify Your Healthcare Provider: If you frequently forget doses, or if you’re unsure about what to do when you miss a dose, consult your healthcare provider. They can provide guidance on how to manage missed doses effectively.

What side effects can this medication cause?

Myambutol (ethambutol) can cause various side effects, some of which are more common, while others are less common but more serious. It’s essential to be aware of these potential side effects and to promptly report any unusual or severe symptoms to your healthcare provider. Common side effects of Myambutol may include:

  • Vision Changes: One of the most significant potential side effects of Myambutol is changes in vision. This can include blurred vision, difficulty distinguishing between colors (especially red and green), and visual disturbances. These vision changes are typically reversible when the medication is discontinued, but they can be permanent if not addressed promptly.
  • Gastrointestinal Disturbances: Some people may experience gastrointestinal side effects, such as nausea, vomiting, or abdominal pain.
  • Skin Rash: Skin rashes or itching may occur in some individuals taking Myambutol.
  • Headache: Headaches are a less common side effect but can occur in some cases.
  • Fever: Fever can be a rare side effect of Myambutol.
  • Joint Pain: Joint pain or discomfort may occur, although this is less common.
  • Nervous System Effects: Although rare, Myambutol can affect the nervous system, leading to symptoms like confusion, hallucinations, or memory problems. If you experience any of these symptoms, seek medical attention immediately.
  • Liver Problems: In rare cases, Myambutol may cause liver problems. Symptoms of liver issues can include yellowing of the skin or eyes (jaundice), abdominal pain, and dark urine. Report these symptoms to your healthcare provider.
  • Kidney Problems: Kidney problems are also rare but possible with Myambutol use. If you experience symptoms like decreased urination or swelling, contact your doctor.
  • Allergic Reactions: Although uncommon, allergic reactions to Myambutol can occur. Symptoms of an allergic reaction may include rash, itching, swelling, severe dizziness, or difficulty breathing. Seek immediate medical attention if you suspect an allergic reaction.

It’s important to note that not everyone will experience these side effects, and some individuals may have no side effects at all while taking Myambutol. Your healthcare provider will monitor your progress during treatment and may perform regular eye examinations to check for vision changes.

If you notice any concerning side effects while taking Myambutol, do not hesitate to contact your healthcare provider. They can assess your condition, adjust your treatment if necessary, and provide guidance on managing any side effects. Additionally, it’s crucial to continue taking Myambutol as prescribed to ensure effective tuberculosis treatment and prevent the development of drug-resistant strains.

What should I know about storage and disposal of this medication?

Here’s what you should know about the storage, disposal, handling of Mycapssa, and what to do in case of an emergency or overdose:


  • Store Myambutol in its original container or packaging in a secure place where it cannot be accessed by children or pets.
  • Store Myambutol at room temperature, away from excessive heat, moisture, and direct sunlight. Avoid storing it in the bathroom, as the humidity can affect the medication.
  • Do not freeze Myambutol.
  • Ensure the medication container is tightly closed to protect it from moisture.
  • Store Myambutol separately from food, beverages, and household products to avoid contamination.


  • Do not flush Myambutol down the toilet or pour it down the drain unless specifically instructed to do so.
  • Check with your local waste disposal or recycling facility for guidelines on how to dispose of unused or expired medications. Many places have designated programs for safe medication disposal.
  • Before disposing of the medication container, remove or obscure any personal information to protect your privacy.

In case of emergency/overdose

If you suspect you or someone else has taken too much Myambutol or is experiencing severe symptoms, seek emergency medical attention immediately. Overdose symptoms may include severe confusion, hallucinations, seizures, difficulty breathing, or loss of consciousness.

What other information should I know

  • Follow Prescribing Instructions: Always take Myambutol as prescribed by your healthcare provider. Complete the full course of treatment, even if you start feeling better. This is essential to prevent the development of drug-resistant tuberculosis.
  • Regular Monitoring: Be prepared for regular check-ups and monitoring by your healthcare provider while you are taking Myambutol. This may include eye exams and assessments for potential side effects.
  • Medication Interactions: Inform your healthcare provider about all other medications, supplements, or herbal products you are taking, as Myambutol can interact with certain drugs.
  • Vision Changes: Be vigilant for changes in your vision, such as blurred vision or difficulty distinguishing between colors, and report them to your doctor promptly.
  • Patient Information: Keep a record of important information related to your medication, including dosing instructions, side effects, and contact information for your healthcare provider.
  • Regular Follow-Up: Attend all scheduled appointments with your healthcare provider to monitor your progress and ensure the effectiveness of treatment.
  • Pregnancy and Breastfeeding: If you are pregnant, planning to become pregnant, or breastfeeding, discuss the risks and benefits of taking Myambutol with your healthcare provider.
  • Drug Allergies: If you have known allergies to any medications, inform your healthcare provider before starting Myambutol.

It’s crucial to use Myambutol as directed and to follow your healthcare provider’s guidance closely throughout your treatment. If you have any questions or concerns about your medication, storage, or any other aspect of your treatment, do not hesitate to discuss them with your healthcare provider. Your safety and well-being are paramount during the course of therapy.

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