Drug level in the blood

Therapeutic drug level is tested in the laboratory blood test to look for the presence and amount of a particular drug in the blood.Most medications, you need a certain level of medication in your blood in order to achieve the desired effect. These drugs can be harmful if the level rises too high and do not work and are not effective if the levels are too low.Checking the drug is particularly important in people taking medications such as:Digoxin is used to treat abnormal contraction of the heart Dilantin or Valproic acid used to treat seizures Gentamicin or Amikacin, an antibiotic used to treat infections.

Those tests can also be performed to determine how well your body breaks down the drug (metabolism), or how it interacts with other necessary drugs.


Types of drugs:

  • Carbamazepine, Tegretol (Tegretol)

  • Digoxin (Digoxin)

  • Ethosuximide (Zrontin)

  • Lithium

  • Phenobarbital (Luminal)

  • Phenytoin, Dantoin (Aidntoain)

  • Quinidine

  • Theophylline (Aminophilin)

  • Valproic acid (Depakote)

  • Lamictal (Lamictal)

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