Specific Safety Issues With Lanoxin

Specific Precautions and Warnings With Lanoxin

Some warnings and precautions to be aware of prior to taking this drug include the following:
  • Lanoxin lowers heart rate, and in some cases may lower it too much. Your healthcare provider may recommend that you measure your heart rate by taking your pulse before each dose. It is generally recommended that people skip their dose and contact their healthcare provider if their pulse is less than 60 beats per minute. Ask your healthcare provider about taking your pulse before each Lanoxin dosage.
  • Although Lanoxin is used to treat heart rhythm problems, in some cases it can cause other, potentially serious arrhythmias. People with certain heart conditions may have an increased risk for developing arrhythmias while taking this drug.
  • People with certain heart conditions may be especially sensitive to the effects of Lanoxin. Make sure your healthcare provider knows your complete medical history before you begin treatment.
  • People with beriberi heart disease (heart disease associated with thiamine deficiency) may not respond as well to Lanoxin unless their thiamine deficiency is also treated.
  • This medication is mostly removed from the body by the kidneys. People with kidney disease may need lower Lanoxin doses.
  • An imbalance of certain blood electrolytes (potassium, magnesium, and calcium) can alter the way Lanoxin works in the body. For example, low potassium or magnesium levels, or high calcium levels, may increase your risk for serious side effects. Low calcium levels may make Lanoxin ineffective.
Your healthcare provider will periodically check your electrolyte levels with a simple blood test. Let your healthcare provider know if you are sick and experience vomiting or diarrhea, as this may affect your blood electrolytes.
  • Tell your healthcare provider if you have thyroid problems (an underactive or overactive thyroid), as these conditions may alter the way your body responds to Lanoxin.
  • Tell your healthcare provider you are taking Lanoxin before you have surgery or medical procedures, including electrical cardioversion.
  • This product can react with a number of other medications (see Lanoxin Drug Interactions).
  • Lanoxin is considered a pregnancy Category C medication. This means that it may not be safe for use during pregnancy (see Lanoxin and Pregnancy).
  • Lanoxin passes through breast milk. Therefore, if you are breastfeeding or plan to start, discuss this with your healthcare provider prior to taking the drug (see Lanoxin and Breastfeeding).
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Lanoxin Drug Information

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