Skip to Content

Label Changes for:

Hyzaar (losartan potassium/HCTZ) Tablets

March 2013

Detailed View: Safety Labeling Changes Approved By FDA Center for Drug Evaluation and Research (CDER) 



March 2013


  • have diabetes and are taking a medicine called aliskiren to reduce blood pressure.


November 2011


  • Dual blockade of the renin-angiotensin-aldosterone system: Dual blockade of the renin-angiotensin-aldosterone system is associated with increased risk of hypotension, syncope, hyperkalemia, and changes in renal function (including acute renal failure). Closely monitor blood pressure, renal function and electrolytes in patients.


What should I tell my doctor before taking?

Especially tell your doctor if you are taking:

  • other medicines to reduce blood pressure 


August 2011



Acute Myopia and Secondary Angle-Closure Glaucoma
  • Hydrochlorothiazide, a sulfonamide, can cause an idiosyncratic reaction, resulting in acute transient myopia and acute angle-closure glaucoma. Symptoms include acute onset of decreased visual acuity or ocular pain and typically occur within hours to weeks of drug initiation. Untreated acute angle-closure glaucoma can lead to permanent vision loss. The primary treatment is to discontinue hydrochlorothiazide as rapidly as possible. Prompt medical or surgical treatments may need to be considered if the intraocular pressure remains uncontrolled. Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy.





Patient Package Insert

What are the possible side effects of Hyzaar?

  • Eye problems. One of the medicines in HYZAAR can cause eye problems that, if left untreated, may lead to vision loss. Symptoms of eye problems can happen within hours to weeks of starting HYZAAR. Tell your doctor right away if you have:
    • decrease in vision




  • or glycyrrhizin (found in liquorice) – intensified electrolyte depletion, particularly hypokalemia.