A member asked:

Can low blood sodium be caused by taking hctz (hydrochlorothiazide) for long time?

2 doctors weighed in across 2 answers
Dr. Howard Min answered

Specializes in Cardiology

Yes: Hyponatremia, or low blood sodium is a known and potentially very dangerous side effect of hydrochlorothiazide (hctz). It can happen in people at any point in therapy, even if the medication had been well tolerated for years. It tends to happen more often in the elderly. If it occurs, once properly treated, the patient should not go back on thiazide-type diuretics again.

Answered 12/10/2013

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Yes it can be: It depends on the dose of hctz (hydrochlorothiazide). Anything over 50mg a day can cause loss of sodium and potassium.

Answered 9/1/2018

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