DRUG INTERACTIONS: Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with your doctor or pharmacist first.This drug should not be used with the following medications because very serious interactions may occur: cidofovir, ketorolac.If you are currently using any of these medications listed above, tell your doctor or pharmacist before starting this medication.Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: antihistamines (e.g., diphenhydramine), anti-platelet drugs (e.g., cilostazol, clopidogrel), anti-seizure medications (e.g., phenytoin, carbamazepine, phenobarbital, valproic acid), bisphosphonates taken by mouth (e.g., alendronate), "blood thinners" (e.g., heparin, warfarin), carbonic anhydrase inhibitors (e.g., acetazolamide), certain diabetes drugs (sulfonylureas such as glyburide), certain drugs for gout (uricosuric drugs such as probenecid, sulfinpyrazone), corticosteroids (e.g., prednisone), cyclosporine, drugs for high blood pressure (including ACE inhibitors such as captopril, angiotensin II receptor antagonists such as losartan, and beta blockers such as metoprolol), drugs for Parkinson's disease (e.g., anticholinergics such as benztropine), isoniazid, lithium, MAO inhibitors (e.g., furazolidone, isocarboxazid, linezolid, moclobemide, phenelzine, procarbazine, rasagiline, selegiline, tranylcypromine), methotrexate, pemetrexed, phenothiazines (e.g., chlorpromazine), SSRI antidepressants (e.g., fluoxetine, sertraline), tenofovir, tricyclic antidepressants (e.g., amitriptyline), "water pills" (diuretics such as furosemide, hydrochlorothiazide, spironolactone).Tell your doctor or pharmacist if you also take drugs that cause drowsiness such as: medicine for sleep or anxiety (e.g., alprazolam, diazepam, zolpidem), muscle relaxants, narcotic pain relievers (e.g., codeine), psychiatric medicines (e.g., risperidone, trazodone). Check all prescription and nonprescription medicine labels (e.g., cough-and-cold products, pain relievers, fever reducers) carefully since many contain ingredients that cause drowsiness.Also check your prescription and nonprescription medicine labels carefully for other ingredients such as acetaminophen and/or drugs that are similar to salicylamide and, if taken together, may increase your risk for side effects (NSAIDs such as aspirin, ibuprofen, naproxen). Low-dose aspirin should be continued if prescribed by your doctor for specific medical reasons such as heart attack or stroke prevention (usually at dosages of 81-325 milligrams per day). Consult your doctor or pharmacist for more details. (See also adult maximum daily dose information for acetaminophen in Side Effects section.)This medication may interfere with certain medical/laboratory tests (including urine 5-HIAA, skin tests), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.

Report Problems to the Food and Drug Administration You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088. Need help identifying pills and medications? Use the pill identifier tool on RxList.