Nephrotic Syndrome Medication
- Author: Eric P Cohen, MD; Chief Editor: Vecihi Batuman, MD, FACP, FASN more...
Medication Summary
Corticosteroids (prednisone), cyclophosphamide, and cyclosporine are used to induce remission in nephrotic syndrome. Diuretics are used to reduce edema. Angiotensin-converting enzyme (ACE) inhibitors and angiotensin II receptor blockers are administered to reduce proteinuria.
Treatment should be dictated by the type of renal pathology causing nephrotic syndrome.
Minimal-change disease has an excellent response to corticosteroids, while in focal glomerulosclerosis, only 20 % patients respond well to corticosteroids. Renal biopsy is very helpful to differentiate minimal-change disease and its variants such as IgM nephropathy and C1q nephropathy. Very few randomized trials are available to guide treatment for minimal-change disease in adults. Prednisone in short courses from 12-20 weeks’ duration remains the mainstay of treatment for patients with minimal-change disease.
Immunosuppressive medications other than steroids are usually reserved for steroid-resistant patients with persistent edema, or for steroid-dependent patients with significant steroid-related adverse effects.
Cyclophosphamide may benefit patients who have frequently relapsing steroid-sensitive nephrotic syndrome. Associated complications include bone marrow suppression, hair loss, azoospermia, hemorrhagic cystitis, malignancy, mutations, and infertility.
Cyclosporine is indicated when relapses occur after cyclophosphamide treatment. Cyclosporine may be preferable in a pubertal male who is at risk of developing cyclophosphamide-induced azoospermia. Cyclosporine is a highly effective maintenance therapy for patients with steroid-sensitive nephrotic syndrome who are able to stop steroids or take lower doses; however, some evidence suggests that although remission is maintained as long as cyclosporine is administered, relapses are frequent when treatment is discontinued.
Cyclosporine can be nephrotoxic and can cause hirsutism, hypertension, and gingival hypertrophy.
For focal glomerulosclerosis, predisone, cyclosporine, and cyclophosphamide have all been used in treatment. Corticosteroids should be the first-line agent, with cyclophosphamide or cyclosporine as backup for steroid-resistant cases. Mycophenolate and rituximab have also been used in treating focal glomerulosclerosis. However, data on the use of these latter 2 agents are not convincing.
For idiopathic membranous nephropathy, prednisone along with chlorambucil or cyclophosphamide remains important for treatment. Other agents that have been used for the treatment are cyclosporine, synthetic corticotropin, and rituximab.
Rituximab has been effective in some cases of nephrotic syndrome that relapse after prednisone treatment or in cases resistant to prednisone treatment.[36] This drug is a chimeric murine/human antibody against the CD20 antigen of B cells. It presumably exerts its benefit by suppressing antibody production. Its adverse effect to cause immunosuppression cannot be ignored.
Corticosteroids
Class Summary
Corticosteroids have anti-inflammatory properties and modify the body's immune response to diverse stimuli.
Prednisone
Prednisone is an immunosuppressant used in treatment of autoimmune disorders. This agent may decrease inflammation by reversing increased capillary permeability and suppressing polymorphonuclear neutrophil (PMN) activity. It may be administered as a single dose in the morning or as divided doses; studies show that a single dose is equally effective and greatly improves compliance.
Immunomodulators
Class Summary
These agents regulate key steps of the immune system.
Cyclophosphamide
Cyclosporine (Sandimmune, Neoral, Gengraf)
Cyclosporine is a cyclic polypeptide that suppresses cell-mediated immune reactions.
For children and adults, base dosing on ideal body weight
Rituximab (Rituxan)
Rituximab is a chimeric humanized murine monoclonal antibody against CD20 antigen found on the surface of lymphocytes.
Immunosuppressants
Class Summary
These agents inhibit key steps that mediate immune reactions.[37, 38]
Mycophenolate (CellCept, Myfortic)
Mycophenolate inhibits inosine monophosphate dehydrogenase and suppresses de novo purine synthesis by lymphocytes, thereby inhibiting their proliferation. It inhibits antibody production.
Diuretics
Class Summary
These agents are used for symptomatic treatment of edema.
Furosemide (Lasix)
Furosemide increases urine output by inhibiting sodium transport in the ascending loop of Henle and the distal renal tubule. The dose must be individualized to the patient. Depending on response, administer at increments of 20-40 mg, no sooner than 6-8 h after the previous dose, until desired diuresis occurs.
Spironolactone (Aldactone)
Spironolactone is used for management of edema resulting from excessive aldosterone excretion. It competes with aldosterone for receptor sites in distal renal tubules, thus enhancing sodium excretion.
Angiotensin-converting Enzyme (ACE) Inhibitors
Class Summary
ACE inhibitors block conversion of angiotensin I to angiotensin II and prevent secretion of aldosterone from the adrenal cortex. These agents are indicated in metabolic alkalosis due to hyperaldosteronism.
Captopril
Captopril prevents conversion of angiotensin I to angiotensin II, a potent vasoconstrictor, resulting in lower aldosterone secretion.
Enalapril (Vasotec)
A competitive inhibitor of ACE, enalapril reduces angiotensin II levels, decreasing aldosterone secretion.
Lisinopril (Prinivil, Zestril)
This agent inhibits ACE, the enzyme that converts angiotensin I to angiotensin II.
Angiotensin II receptor antagonists
Class Summary
ARBs antagonize the action of angiotensin II at the type 1 receptor, reducing systemic arterial blood pressure and blunting the intrarenal effect of angiotensin II. If ACE inhibitors cause cough, ARBs may be substituted.
Valsartan (Diovan)
Valsartan is a prodrug that directly antagonizes angiotensin II receptors. It displaces angiotensin II from the AT1 receptor and may lower blood pressure by antagonizing AT1-induced vasoconstriction, aldosterone release, catecholamine release, arginine vasopressin release, water intake, and hypertrophic responses. Valsartan may induce more complete inhibition of the renin-angiotensin system than do ACE inhibitors. It does not affect bradykinin and is less likely to be associated with cough and angioedema. Valsartan is for use in patients who are unable to tolerate ACE inhibitors.
Losartan (Cozaar)
This ARB blocks the vasoconstrictor and aldosterone-secreting effects of angiotensin II. It may induce a more complete inhibition of the renin-angiotensin system than ACE inhibitors, does not affect the response to bradykinin, and is less likely to be associated with cough and angioedema. It is used in patients unable to tolerate ACE inhibitors.
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