Drug

Torsemide

Common brand names:

Demadex

Summary of Interactions with Vitamins, Herbs, & Foods

  • Negative Interactions

    2
    • Torsemide

      Dandelion

      Potential Negative Interaction

      This interaction is based on this drug belonging to a drug class. While this drug may differ from the text and references below, drugs within this class work in a similar way and this interaction is applicable to drugs within the same class.

      Herbs that have a diuretic effect should be avoided when taking diuretic medications, as they may increase the effect of these drugs and lead to possible cardiovascular side effects. These herbs include dandelion, uva ursi, juniper, buchu, cleavers, horsetail, and gravel root.
      Dandelion
      Torsemide
      ×
      1. Brinker F. Herb Contraindications and Drug Interactions. Sandy, OR: Eclectic Institute, 1997, 102-3.
    • Torsemide

      Digitalis

      Potential Negative Interaction

      This interaction is based on this drug belonging to a drug class. While this drug may differ from the text and references below, drugs within this class work in a similar way and this interaction is applicable to drugs within the same class.

      Digitalis (Digitalis purpurea) refers to a family of plants commonly called foxglove that contain digitalis glycosides, chemicals with actions and toxicities similar to the prescription drug digoxin. Loop diuretics can increase the risk of digitalis-induced heart disturbances. Loop diuretics and digitalis-containing products should only be used under the direct supervision of a doctor trained in their use.

      Digitalis
      Torsemide
      ×
      1. Threlkeld DS, ed. Diuretics and Cardiovasculars, Thiazides and Related Diuretics. In Facts and Comparisons Drug Information. St. Louis, MO: Facts and Comparisons, Apr 1993, 135a-7c.
  • Supportive Interactions

    3
    • Torsemide

      Folic Acid

      Replenish Depleted Nutrients

      One study showed that people taking diuretics for more than six months had dramatically lower blood levels of folic acid and higher levels of homocysteine compared with individuals not taking diuretics. Homocysteine, a toxic amino acid byproduct, has been associated with atherosclerosis. Until further information is available, people taking diuretics for longer than six months should probably supplement with folic acid.

      Folic Acid
      Torsemide
      ×
      1. Morrow LE, Grimsley EW. Long-term diuretic therapy in hypertensive patients: effects on serum homocysteine, vitamin B6, vitamin B12, and red blood cell folate concentrations. South Med J 1999;92:866-70.
    • Torsemide

      Magnesium and Potassium

      Replenish Depleted Nutrients

      Potassium-depleting diuretics, including loop diuretics, cause the body to lose potassium. Loop diuretics may also cause cellular magnesium depletion, although this deficiency may not be reflected by a low blood level of magnesium. Magnesium loss induced by potassium-depleting diuretics can cause additional potassium loss. Until more is known, it has been suggested that people taking potassium-depleting diuretics, including loop diuretics, should supplement both potassium and magnesium.

      People taking loop diuretics should be monitored by their doctor, who will prescribe potassium supplements if needed. Such supplementation is particularly critical before surgery in patients with a history of heart disease. In a preliminary study, people with low blood levels of potassium (in part related to diuretic use) had a higher incidence of serious problems resulting from surgery (including death) compared with those having normal potassium levels. Fruit is high in potassium, and increasing fruit intake is another way of supplementing potassium. Magnesium supplementation is typically 300–400 mg per day.

      Magnesium and Potassium
      Torsemide
      ×
      1. Martin B, Milligan K. Diuretic-associated hypomagnesiumia in the elderly. Arch Intern Med 1987;147:1768-71.
      2. Kroenke K, Wood DR, Hanley JF. The value of serum magnesium determination in hypertensive patients receiving diuretics. Arch Intern Med 1987;147:1553-6.
      3. Whang R, Whang DD, Ryan MP. Refractory potassium repletion. A consequence of magnesium deficiency. Arch Intern Med 1992;152:40-5.
      4. Wahr JA, Parks R, Boisvert D, et al. Preoperative serum potassium levels and perioperative outcomes in cardiac surgery patients. JAMA 1999;281:2203-10.
    • Torsemide

      Vitamin B1

      Replenish Depleted Nutrients

      People with congestive heart failure (CHF) treated with the loop diuretic furosemide may be at risk for vitamin B1 deficiency due to: 1) the disease, 2) treatment with furosemide, and/or 3) inadequate dietary vitamin B1 intake. In a study of people with CHF, long-term furosemide therapy was associated with clinically significant vitamin B1 deficiency due to urinary losses. This furosemide-induced vitamin B1 deficiency may worsen heart function in patients with CHF and may be prevented or corrected with vitamin B1 supplementation.

      Vitamin B1
      Torsemide
      ×
      1. Brady JA, Rock CL, Horneffer MR. Thiamin status, diuretic medications, and the management of congestive heart failure. J Am Dietet Assoc 1995;95:541-4.
      2. Seligman H, Halkin H, Rauchfleisch S, et al. Thiamine deficiency in patients with congestive heart failure receiving long-term furosemide therapy: A pilot study. Am J Med 1991;91:151-5.
      3. Shimon I, Almog S, Vered Z, et al. Improved left ventricular function after thiamine supplementation in patients with congestive heart failure receiving long-term furosemide therapy. Am J Med 1995;98:485-90.
  • Explanation Required

    3
    • Torsemide

      Diuretic Herbs

      Needs Explanation

      Herbs that have a diuretic effect should be avoided when taking diuretic medications, as they may enhance the effect of these drugs and lead to possible cardiovascular side effects. These herbs include dandelion, uva ursi, juniper, buchu, cleavers, horsetail, and gravel root.

      Use buckthorn (Rhamnus catartica, Rhamnus frangula, Frangula alnus) or alder buckthorn for more than ten days consecutively may cause a loss of electrolytes (especially the mineral potassium). Medications that also cause potassium loss, such as some diuretics, should be used with caution when taking buckthorn or alder buckthorn.

      Diuretic Herbs
      Torsemide
      ×
      1. Brinker F. Herb Contraindications and Drug Interactions. Sandy, OR: Eclectic Institute, 1997, 102-3.
      2. European Scientific Cooperative on Phytotherapy (ESCOP). Frangulae cortex, frangula bark. Monographs on the Medicinal Uses of Plant Drugs. Exeter, UK: University of Exeter, Centre for Complementary Health Studies, 1997.
    • Torsemide

      Licorice

      Needs Explanation
      Licorice (Glycyrrhiza glabra) may worsen the side effects of potassium-depleting diuretics, including loop diuretics. Loop diuretics and licorice should be used together only under careful medical supervision. Deglycyrrhizinated licorice (DGL) may be used safely with all diuretics.
      Licorice
      Torsemide
      ×
      1. Shintani S, Murase H, Tsukagoshi H, Shiigai T. Glycyrrhizin (licorice)-induced hypokalemic myopathy. Report of two cases and review of the literature. Eur Neurol 1992;32:44-51.
    • Torsemide

      Sodium

      Needs Explanation

      Diuretics, including loop diuretics, cause increased loss of sodium in the urine. By removing sodium from the body, diuretics also cause water to leave the body. This reduction of body water is the purpose of taking diuretics. Therefore, there is usually no reason to replace lost sodium, although strict limitation of salt intake in combination with the actions of diuretics can sometimes cause excessive sodium depletion. On the other hand, people who restrict sodium intake and in the process reduce blood pressure may need to have their dose of diuretics lowered.

The Drug-Nutrient Interactions table may not include every possible interaction. Taking medicines with meals, on an empty stomach, or with alcohol may influence their effects. For details, refer to the manufacturers’ package information as these are not covered in this table. If you take medications, always discuss the potential risks and benefits of adding a new supplement with your doctor or pharmacist.

Copyright © 2025 TraceGains, Inc. All rights reserved.

RxAnswers™ is a copyrighted product from TraceGains.

This information is intended only for residents of the United States. Products sold under the same brand names in other countries may contain different ingredients.

There are some limitations on the information provided in “Nutrient Interactions.” Do NOT rely solely on the information in this article. Please read the disclaimer.

Learn more about TraceGains, the company.

Learn more about the authors of RxAnswers.

TraceGains and/or its suppliers make no warranties or representations as to the accuracy or completeness of this content herein or that of any organization referred or linked to within this content and will not be liable for any damages arising out of your access to or use of any information found herein or that of any organization referred to within this content.

Information expires December 2025.