Hydrochlorothiazide vs. Ziac for Hypertension: Important Differences and Potential Risks.

Key takeaways

Hydrochlorothiazide (generic name) and Ziac (bisoprolol/hydrochlorothiazide) are both medications used to lower blood pressure, but they belong to different drug classes. Hydrochlorothiazide is a thiazide diuretic, also known as a water pill, that helps you urinate more to remove extra fluid and certain electrolytes from your body. Ziac, on the other hand, is a combination of two medications: bisoprolol, a cardioselective beta blocker, and hydrochlorothiazide. Bisoprolol works by slowing down your heart rate and lowering blood pressure, while hydrochlorothiazide in Ziac has the same diuretic effect as when taken alone. Hydrochlorothiazide is typically taken once or twice daily, whereas Ziac is taken once daily. Both medications can cause dizziness and increased urination. Ziac may also cause tiredness and has a specific warning about stopping it suddenly due to the risk of serious heart problems. Additionally, both medications are available in generic forms, which can help save you money.

Hydrochlorothiazide

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Ziac

(bisoprolol / hydrochlorothiazide)

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Summary for Hydrochlorothiazide

Prescription only

Hydrochlorothiazide is a diuretic or water pill. It helps lower blood pressure. It also helps with swelling from fluid buildup (edema) caused by some health conditions, like heart failure and kidney problems. People of all ages can take hydrochlorothiazide tablets and capsules. But children typically take much smaller, weight-based doses. You typically take your dose by mouth once (sometimes twice) daily, but avoid nighttime dosing so you won't wake up to urinate. Some common side effects are dizziness and urinating more often.

Indications for Hydrochlorothiazide

High blood pressure
Swelling in the body from fluid buildup (edema)

Pros and Cons for Hydrochlorothiazide

Pros

Helps getting rid of extra fluid in your body
A first-choice treatment option if you have high blood pressure or heart failure
Dose can be adjusted based on how well it's working for you

Cons

Can make you urinate more often
Can cause electrolytes and fluid levels to be out of balance, which can be dangerous
Might not be a good option for people with a sulfa allergy

Common Side Effects for Hydrochlorothiazide

Dizziness
Weakness
Headache
Blurry vision
Low blood pressure
Change in electrolyte levels

Warnings for Hydrochlorothiazide

Low fluid and electrolyte levels in the body
Possibly higher calcium levels
Higher blood sugar
Risk of gout
Risk of vision problems and glaucoma
Use with caution in people with kidney problems

Summary for Ziac

Prescription only

Ziac, the brand name for bisoprolol/hydrochlorothiazide or bisoprolol/HCTZ, is a combination medication. It's used to treat high blood pressure in adults. It contains two classes of medications: a beta blocker (bisoprolol) and a diuretic (hydrochlorothiazide). It comes as a tablet that's taken by mouth once a day. Some side effects include dizziness and tiredness.

Indications for Ziac

High blood pressure

Pros and Cons for Ziac

Pros

Only taken once daily
Combines two blood pressure medications into one tablet
Can take with or without food

Cons

Comes in fixed dosage strengths, so it's harder to adjust the doses of the individual ingredients
Can make you urinate more often
Not a good option for people with a sulfa allergy

Common Side Effects for Ziac

Dizziness (5%)
Tiredness (5%)
Headache (5%)
Diarrhea (4%)

Warnings for Ziac

Risk of heart problems after stopping Ziac (bisoprolol / hydrochlorothiazide) suddenly
Risk of heart failure
Changes in fluids and electrolytes in the body
Hidden symptoms of low blood sugar
Hidden symptoms of overactive thyroid
Caution use in people with breathing problems
Caution use in people with peripheral artery disease (PAD)
Risk of vision problems and glaucoma