Isoniazid
(Isoniazid)-
All Strengths
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100mg
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300mg
What is a generic medication?
Generic medications are significantly discounted copies of brand name medication that have the same active ingredients, intended use, dosage, side effects, effects, and route of administration as the original brand name medication. In other words, generic medications have the same pharmacological effects as their brand-name counterparts. Over half of all prescribed medications are for generic medications.
Isoniazid Drug Information
Are you paying too much for Isoniazid? Save up to 80% when purchasing your prescription drugs from Universal Drugstore. Our prescription service aspires to conveniently provide you with affordable medications at the lowest prices in Canada and internationally.
We’re working with a number of Canadian and international pharmacy partners, all licensed by their qualified governmental regulatory bodies. By collaborating with our partners, we are able to offer a wide range of brand and generic medications at very competitive prices. You can obtain discount prescription drugs through our online pharmacy. Our prices are already up to 80% lower than your local pharmacy. We are committed to providing you with the best service and prices. This is why we’ll match the price of any of our online pharmacy competitors who require a valid prescription.
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Why Buy Isoniazid from Universal Drugstore?
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How Long Does It Take to Receive My Isoniazid Order?
You can easily place an order on our website in under 5 minutes. First you need to set up an account with us, create a payment method, and send us your prescriptions. Alternatively, you can order by downloading our order form or by placing an order over the phone. Delivery can take approximately 2 weeks to North America, and 4 weeks to other countries.
Isoniazid Overview
Isoniazid is used with other medications to treat active tuberculosis (TB) infections. It is also used alone to prevent active TB infections in people who may be infected with the bacteria (people with positive TB skin test). Isoniazid is an antibiotic and works by stopping the growth of bacteria. This antibiotic treats only bacterial infections. It will not work for viral infections (such as common cold, flu). Using any antibiotic when it is not needed can cause it to not work for future infections.
Isoniazid Warnings
Isoniazid has rarely caused very serious (possibly fatal) liver disease. The risk of liver disease is increased in people who are 35 years and older, who use alcohol or illegal injection drugs, or who currently have long-term liver problems. Tell your doctor right away if you develop symptoms of liver disease, including nausea/vomiting that doesn't stop, severe stomach/abdominal pain, unusual weakness/tiredness, dark urine, yellowing eyes/skin. Your doctor should order liver function tests while you are taking Isoniazid. Keep all medical and laboratory appointments.
How to Use Isoniazid
Take Isoniazid by mouth on an empty stomach (1 hour before or 2 hours after meals) as directed by your doctor. If you are using the liquid form of Isoniazid, carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose. If you also take antacids that contain aluminum, take Isoniazid at least 1 hour before the antacid. Dosage of Isoniazid is based on your age, weight, medical condition, and response to treatment. For the best effect, take Isoniazid at evenly spaced times. If you are taking Isoniazid daily, take it at the same time each day. If you are taking Isoniazid on a weekly schedule, take it on the same day(s) of the week and at the same time each day. Mark the days on the calendar when you need to take the medication. Continue to take Isoniazid (and other TB medications) until the full prescribed amount is finished, even if symptoms disappear. Stopping the medication too early or skipping doses may allow the bacteria to continue to grow, which may result in a return of the infection and cause the infection to be more difficult to treat (resistant). Your doctor may also direct you to take vitamin B6 (pyridoxine) to help prevent certain side effects (such as nerve problems) from isoniazid. Follow your doctor's instructions carefully. Isoniazid may interact with foods containing tyramine/histamine (such as cheese, red wine, certain types of fish). This interaction may cause increased blood pressure, flushing of the skin, headache, dizziness, or fast/pounding heartbeat. Tell your doctor right away if any of these symptoms occur. Your doctor may recommend that you follow a special diet while taking Isoniazid. Consult your doctor for more details. Tell your doctor if your condition lasts or gets worse.
Isoniazid Precautions
Before taking isoniazid, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. Isoniazid may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using Isoniazid, tell your doctor or pharmacist your medical history,previous severe reaction from isoniazid (such as liver disease), liver disease, alcohol use, HIV infection, kidney disease, diabetes, numbness/tingling of arms/legs (peripheral neuropathy), recent childbirth. Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). Alcohol may increase the risk of liver disease. Avoid alcoholic beverages while using Isoniazid. Isoniazid may cause live bacterial vaccines (such as BCG vaccine) to not work well. Tell your health care professional that you are using Isoniazid before having any immunizations/vaccinations. Liquid forms of Isoniazid may contain sugar. Caution is advised if you have diabetes or any other condition that requires you to limit/avoid sugar. Ask your doctor or pharmacist about using Isoniazid safely. During pregnancy, Isoniazid should be used only when clearly needed. Discuss the risks and benefits with your doctor. Isoniazid passes into breast milk but is unlikely to harm a nursing infant. Consult your doctor before breast-feeding.
Isoniazid Misdose
It is important to take each dose of Isoniazid as scheduled. If you are taking Isoniazid daily and miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up. If you are taking Isoniazid on a weekly schedule and miss a dose, take it as soon as you remember if it is on the same day. If you remember on the next day or later, ask your doctor or pharmacist right away for a new dosing schedule. Do not double the dose to catch up.
Isoniazid Interactions
See also How to Use section. Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.acetaminophen, certain azole antifungals (itraconazole, ketoconazole), disulfiram, MAO inhibitors (isocarboxazid, linezolid, metaxalone, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, safinamide, selegiline, tranylcypromine), phenytoin, SSRI antidepressants (such as fluoxetine, sertraline), valproic acid. Isoniazid may interfere with certain laboratory tests (including urine glucose tests), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use Isoniazid.
Isoniazid Side Effects
Nausea/vomiting or stomach upset may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. Remember that Isoniazid has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using Isoniazid do not have serious side effects.numbness/tingling of arms/legs, painful/swollen joints.increased thirst/urination, vision changes, easy bruising/bleeding, mental/mood changes (such as confusion, psychosis), seizures. A very serious allergic reaction to Isoniazid is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction,fever that doesn't go away, new or worsening lymph node swelling, rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Isoniazid Storage
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets. Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard Isoniazid when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
IMPORTANT DISCLAIMER: All medical content is supplied by a third-party company who is independent from this web site. As such, this web site cannot guarantee the reliability, accuracy, and /or medical efficacy of the information provided. In all circumstances, you should seek the advice of a health professional pertaining to drug, treatment and/or medical condition advice. Note that not all products are shipped by our contracted Canadian pharmacy. This website contracts with dispensaries around the world that ship products directly to our customers. Some of the jurisdiction include but are not limited to United Kingdom, Europe, Turkey, India, Canada, Vanuatu, Mauritius, and USA. The items within your order may be shipped from any one of these jurisdictions depending on the availability and cost of the products at the time you place your order. The products are sourced from these countries as well as others. Please note that the product appearance may vary from actual product received depending on availability.