Detailed View: Safety Labeling Changes Approved By FDA Center for Drug Evaluation and Research (CDER)
- Potassium:… salt substitutes containing potassium or other drugs that may increase potassium levels (e.g., heparin)…
PATIENT COUNSELING INFORMATION
Information for Patients
- Advise the patient to read the FDA-approved patient labeling (Patient Information)
- Dermatologic: bullous dermatitis
- Lithium: Increases in serum lithium concentrations and lithium toxicity have been reported during concomitant administration of lithium angiotensin II receptor antagonists, including valsartan. Monitor serum lithium levels is during concomitant use.
- Do not co-administer aliskiren with Diovan/Diovan HCT in patients with diabetes
Dual Blockade of the Renin-Angiotensin System (RAS)
- Dual blockade of the RAS with angiotensin receptor blockers, ACE inhibitors, or aliskiren is associated with increased risks of hypotension, hyperkalemia, and changes in renal function (including acute renal failure) compared to monotherapy. Closely monitor blood pressure, renal function and electrolytes in patients on Diovan/HCT and other agents that affect the RAS.
- Do not co-administer aliskiren with Diovan/HCT in patients with diabetes. Avoid use of aliskiren with Diovan in patients with renal impairment (GFR <60 ml/min).
- Do not use in patients with known hypersensitivity to any component.
WARNINGS AND PRECAUTIONS
Impaired Renal Function
- Changes in renal function including acute renal failure can be caused by drugs that inhibit the renin-angiotensin system and by diuretics. Patients whose renal function may depend in part on the activity of the reninangiotensin system (e.g. patients with renal artery stenosis, chronic kidney disease, severe congestive heart failure, or volume depletion) may be at particular risk of developing acute renal failure on Diovan. Monitor renal function periodically in these patients. Consider withholding or discontinuing therapy in patients who develop a clinically significant decrease in renal function on Diovan.
- Some patients with heart failure have developed increases in potassium. These effects are usually minor and transient, and they are more likely to occur in patients with pre-existing renal impairment. Dosage reduction and/or discontinuation of Diovan may be required
- About 93% of patients received concomitant ACE inhibitors. Discontinuations occurred in 0.5% of valsartan-treated patients and 0.1% of placebo patients for each of the following:
- elevations in creatinine and elevations in potassium.
- Discontinuations due to renal dysfunction occurred in 1.1% of valsartan-treated patients and 0.8% of captopril-treated patients.
- Some of these patients previously experienced angioedema with other drugs including ACE inhibitors. Diovan should not be re-administered to patients who have had angioedema.
- renal failure
CYP 450 Interactions
- In vitro metabolism studies indicate that CYP 450 mediated drug interactions between valsartan and co-administered drugs are unlikely because of the low extent of metabolism.
- Concomitant use of valsartan with other agents that block the renin-angiotensin system, potassium sparing diuretics (e.g., spironolactone, triamterene, amiloride), potassium supplements, or salt substitutes containing potassium may lead to increases in serum potassium and in heart failure patients to increases in serum creatinine. If co-medication is considered necessary, monitoring of serum potassium is advisable.