Tolvaptan (Oral Route)

Name: Tolvaptan (Oral Route)

US Brand Name

  1. Samsca

Descriptions

Tolvaptan is used to treat hyponatremia (low sodium in the blood) in patients with heart failure or syndrome of inappropriate antidiuretic hormone (SIADH).

Sodium is a chemical that the body needs to be able to function well. If you have a low sodium blood level, your body will not function normally and you may not feel well. Tolvaptan works in the kidneys to help maintain the right amount of sodium for the body.

This medicine is available only with your doctor's prescription.

This product is available in the following dosage forms:

  • Tablet

Breastfeeding

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Drug Interactions

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

  • Boceprevir
  • Clarithromycin
  • Cobicistat
  • Conivaptan
  • Delavirdine
  • Idelalisib
  • Indinavir
  • Itraconazole
  • Ketoconazole
  • Nefazodone
  • Nelfinavir
  • Posaconazole
  • Ritonavir
  • Saquinavir
  • Telaprevir
  • Telithromycin
  • Tipranavir
  • Voriconazole

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Amobarbital
  • Amprenavir
  • Aprepitant
  • Atazanavir
  • Butabarbital
  • Carbamazepine
  • Ceritinib
  • Crizotinib
  • Digoxin
  • Diltiazem
  • Dronedarone
  • Efavirenz
  • Eliglustat
  • Erythromycin
  • Fluconazole
  • Fosamprenavir
  • Fosaprepitant
  • Fosphenytoin
  • Imatinib
  • Lumacaftor
  • Modafinil
  • Nevirapine
  • Oxcarbazepine
  • Pentobarbital
  • Phenobarbital
  • Phenytoin
  • Pioglitazone
  • Rifabutin
  • Rifampin
  • Rifapentine
  • Secobarbital
  • Simeprevir
  • St John's Wort
  • Verapamil
  • Vincristine
  • Vincristine Sulfate Liposome

Other Interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following is usually not recommended, but may be unavoidable in some cases. If used together, your doctor may change the dose or how often you use this medicine, or give you special instructions about the use of food, alcohol, or tobacco.

  • Grapefruit Juice

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For oral dosage form (tablets):
    • For hyponatremia:
      • Adults—At first, 15 milligrams (mg) once a day. Your doctor will adjust your dose as needed. However, the dose is usually not more than 60 mg per day.
      • Children—Use and dose must be determined by your doctor.
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