Drug Interactions between IsonaRif and Symbicort

Using isoniazid together with rifAMPin can cause serious side effects that may affect your liver. You should avoid or limit the use of alcohol while being treated with these medications. Your doctor may already be aware of the risks but has determined that this is the best course of treatment for you, has taken appropriate precautions, and is monitoring you closely for any potential complications. If you develop severe liver problems, you may need a dose adjustment or an interruption in therapy. Call your doctor immediately if you have fever, chills, joint pain or swelling, unusual bleeding or bruising, skin rash, itching, loss of appetite, fatigue, nausea, vomiting, abdominal pain, dark colored urine, light colored stools, and/or yellowing of the skin or eyes, as these may be signs and symptoms of liver damage. Talk to your healthcare provider if you have any questions or concerns. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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The following interaction applies to orally and rectally administered formulations of budesonide that are typically used in the treatment of inflammatory bowel disease like ulcerative colitis or Crohn's disease. It does not apply to budesonide that is administered via oral inhalation (for the treatment of asthma or COPD) or other routes. -- rifAMPin may reduce the levels of budesonide in your intestine or bowel. Contact your doctor if your symptoms worsen or your condition changes. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications, including rifAMPin or budesonide, without first talking to your doctor.

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Isoniazid may increase the absorption of the medication from budesonide into the blood stream. In some cases, this can increase side effects such as swelling, weight gain, high blood pressure, high blood glucose, muscle weakness, depression, acne, thinning skin, stretch marks, easy bruising, bone density loss, cataracts, menstrual irregularities, excessive growth of facial or body hair, and abnormal distribution of body fat, especially in the face, neck, back, and waist. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Other side effects that may occur include decreased ability to fight infections, increased risk of developing infections, and inadequate response to stress such as infection, surgery, trauma, or a severe asthma attack. Children may experience a reduced growth rate due to excessive effects of budesonide. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Using formoterol together with isoniazid may increase cardiovascular side effects such as heart palpitations, chest pain, increased heart and pulse rates, and blood pressure elevations. The risk exists even when formoterol or similar medications are given by oral inhalation directly into the lungs, and more so if these products are overused. Talk to your doctor before using these medications if you have a history of heart disease or high blood pressure. Depending on your condition, it may be preferable to wait at least 14 days after you are off isoniazid before you start using formoterol. Do not exceed the dose and frequency of use of formoterol recommended on the product label or prescribed by your doctor. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Information for this minor interaction is available on the professional version.