Exciting news! 🎉 Qwark’s AI pharmacy assistant (in beta) is now live and ready to answer any medication-related questions you may have!Try it out now!
  1. Drugs
  2. Isoniazid
Isoniazid Image

Isoniazid

Free shipping
No membership fee
Qwark price promise
Qwark is committed to lowering your prescription prices. We will always recommend the best price we can find. If you find a lower price on an identical, in-stock product, tell us and we'll match it.

For more strengths and prices, please contact Qwark support

Need help?

Our patient support team is available Monday through Friday 8AM - 6PM PST, and Saturday 9AM - 12PM PST.

What Is Isoniazid?

Isoniazid is a prescription antibiotic that is commonly used to treat tuberculosis (TB), a bacterial lung infection that can be life-threatening if left untreated. It is part of a group of medications known as first-line anti-tuberculosis drugs. This medication works by inhibiting the growth and reproduction of the tuberculosis bacteria, ultimately helping to eliminate the infection from the body. Isoniazid is usually taken in combination with other antibiotics to maximize its effectiveness and reduce the risk of developing drug-resistant strains of tuberculosis. It's important to follow the prescribed treatment regimen for isoniazid as directed by your healthcare provider. This typically involves taking the medication every day for several months to ensure complete eradication of the infection. It is important to complete the full course of treatment, even if you start feeling better, to prevent the bacteria from becoming resistant to the medication. While isoniazid is generally considered safe, it can cause side effects in some individuals. Common side effects may include nausea, vomiting, rash, and liver toxicity. Regular monitoring of liver function is recommended during treatment. If you experience any concerning side effects, it's important to inform your healthcare provider immediately. Overall, isoniazid is an important antibiotic used in the treatment of tuberculosis, but it should only be taken under the supervision and guidance of a qualified healthcare professional.

How to use Isoniazid?

To effectively use isoniazid, it is essential to follow your doctor's instructions and prescription guidelines. Here are some general guidelines for using isoniazid to treat tuberculosis: 1. Dosage: Take isoniazid exactly as prescribed by your healthcare provider. The dosage may vary depending on factors such as your age, weight, and the severity of your condition. It is crucial not to skip any doses and complete the full course of treatment, even if you start feeling better. 2. Timing: Take isoniazid on an empty stomach, either one hour before meals or two hours after meals. This helps optimize the absorption of the medication. 3. Combination therapy: Isoniazid is usually prescribed as part of a combination therapy regimen for tuberculosis. This means you will be taking multiple drugs simultaneously. Follow your doctor's instructions on when and how to take each medication to ensure the most effective treatment outcome. 4. Duration of treatment: The length of treatment with isoniazid can vary, but it typically lasts for at least six months. It is crucial to complete the full course of treatment, even if you start feeling better before the prescribed duration. This helps prevent the development of drug-resistant strains of tuberculosis bacteria. 5. Follow-up tests: During your treatment, your doctor may order periodic tests to monitor your progress and ensure the effectiveness of the medication. Attend all scheduled follow-up appointments and tests to evaluate the response to treatment. 6. Possible side effects: Like any medication, isoniazid can potentially cause side effects. Common side effects may include nausea, loss of appetite, and fatigue. If you experience any severe or persistent side effects, notify your doctor immediately. 7. Drug interactions: Inform your healthcare provider about all the medications, supplements, and herbal products you are taking. Some drugs can interact with isoniazid, affecting its effectiveness or increasing the risk of side effects. Remember, the information provided here is a general overview, and it is vital to consult your healthcare provider for personalized instructions and guidance specific to your condition.

Some important warnings associated with the use of isoniazid include: 1. Liver toxicity: Isoniazid can cause liver damage, including hepatitis. Patients should be monitored for signs of liver problems, such as jaundice (yellowing of the skin and eyes), abdominal pain, and dark urine. Regular liver function tests are often recommended during treatment. 2. Peripheral neuropathy: Isoniazid can cause nerve damage, known as peripheral neuropathy. Symptoms may include tingling or numbness in the hands or feet. It is more common in individuals with poor nutrition, alcoholism, diabetes, or other conditions that affect the nerves. 3. Hypersensitivity reactions: Some patients may experience allergic reactions to isoniazid, which can be severe. Symptoms may include rash, itching, swelling, dizziness, difficulty breathing, or fever. If such reactions occur, immediate medical attention should be sought. 4. Drug interactions: Isoniazid can interact with other medications, including certain antidepressants, sedatives, and antiepileptic drugs. These interactions can affect the effectiveness of the drugs or increase the risk of side effects. It is important to inform the healthcare provider of all medications being taken. 5. Ethanol (alcohol) interaction: Alcohol consumption while taking isoniazid can increase the risk of liver toxicity and side effects. It is recommended to avoid alcohol during treatment with isoniazid. It is crucial to closely follow the prescribed dosage and duration of treatment with isoniazid. Any concerns or side effects should be discussed with a healthcare professional promptly.

Before taking Isoniazid, it's important to be aware of certain warnings and precautions. This antibiotic is primarily used to treat tuberculosis, a serious lung infection caused by bacteria. Here are some important points to consider: 1. Allergies: Inform your healthcare provider if you have any known allergies to Isoniazid or any other medications. It's crucial to avoid taking this drug if you have a known allergy, as it may lead to severe reactions. 2. Liver problems: If you have a history of liver disease or experience any symptoms such as nausea, vomiting, abdominal pain, dark urine, or yellowing of the skin or eyes, inform your doctor. Isoniazid can sometimes cause liver damage, so regular monitoring of liver function is necessary during treatment. 3. Peripheral neuropathy: Isoniazid can cause nerve damage known as peripheral neuropathy. Symptoms may include tingling, numbness, or a burning sensation in the hands or feet. Inform your healthcare provider if you experience any of these symptoms. Supplementation with vitamin B6 may help prevent or minimize peripheral neuropathy. 4. Mental health issues: Be cautious if you have a history of mental health disorders such as depression or psychosis. Isoniazid may worsen these conditions, so close monitoring is needed during treatment. 5. Drug interactions: Inform your doctor about all the medications you are currently taking, including over-the-counter drugs, vitamins, and herbal supplements. Some medications, such as certain antidepressants and anticonvulsants, can interact with Isoniazid and cause potentially harmful effects. 6. Pregnancy and breastfeeding: If you are pregnant or breastfeeding, discuss the risks and benefits of taking Isoniazid with your doctor. It can pass into breast milk and may potentially harm the baby. Always follow your healthcare provider's instructions and disclose your complete medical history before starting Isoniazid treatment. This medication should only be taken under the supervision of a healthcare professional.

Common side effects of isoniazid may include nausea, vomiting, and upset stomach. Some individuals may experience dizziness, headache, or fatigue. There is also a possibility of developing an allergic reaction, which can result in symptoms such as rash, itching, or swelling. In rare cases, isoniazid can cause more serious side effects. These can include liver damage, indicated by symptoms such as yellowing of the skin or eyes, dark urine, or persistent nausea. Additionally, nerve damage, known as peripheral neuropathy, is a potential concern with long-term use of isoniazid. Signs of this condition may include numbness or tingling in the hands or feet, muscle weakness, or unsteadiness. It's important to note that the potential benefits of taking isoniazid to treat tuberculosis generally outweigh the risks of side effects. However, close monitoring by a healthcare professional is necessary to ensure the medication is well-tolerated and to promptly address any adverse reactions that may arise.

The active ingredient in isoniazid is, unsurprisingly, isoniazid itself. It is the primary component responsible for the drug's antimicrobial properties. However, the medication may also contain inactive ingredients, which are substances that do not have a therapeutic effect but aid in the formulation, stability, or absorption of the drug. These inactive ingredients can vary depending on the specific manufacturer and form of isoniazid. Some common inactive ingredients found in isoniazid tablets include microcrystalline cellulose, corn starch, pregelatinized starch, sodium starch glycolate, magnesium stearate, and talc. These ingredients serve different purposes, such as providing texture, improving tablet disintegration, and assisting with the manufacturing process. It is important to note that individuals with known allergies or sensitivities to any of these components should consult their healthcare provider and carefully read the medication packaging to ensure the medication is safe for them to use.

Isoniazid, an important antibiotic used to treat tuberculosis, should be stored properly to maintain its effectiveness and ensure safety. Here are some guidelines for handling the storage of Isoniazid: 1. Temperature: Store Isoniazid at room temperature, ideally between 59°F and 86°F (15°C and 30°C). 2. Humidity: Keep the medication away from excessive moisture. Avoid storing it in areas like the bathroom, where humidity levels can be high. 3. Light: Protect Isoniazid from direct sunlight and harsh lighting. Store it in a dark and dry place, such as a closed cabinet or drawer. 4. Packaging: Keep Isoniazid in its original packaging until you are ready to use it. This helps to protect the medication from environmental factors and maintain its integrity. 5. Childproofing: Store Isoniazid in a secure location, out of reach and sight of children. Consider using childproof containers if necessary. 6. Avoid exposure: Ensure that Isoniazid is not exposed to extreme temperatures, such as freezing or excessive heat. Do not store it near radiators, stoves, or other sources of heat. Always refer to the precise storage instructions provided by your pharmacist or listed on the medication's packaging. If you have any doubts or concerns about the storage of Isoniazid, consult your healthcare provider or pharmacist for clarification.