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Generic Name: hydrochlorothiazide and bisoprolol (HYE droe klor oh THYE a zide and bi SOE proe lol)
Brand Names: Ziac
Ziac (hydrochlorothiazide & bisoprolol) is a beta-blocker used to treat high blood pressure (hypertension). Includes Ziac side effects, interactions and indications.
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Drug Information:
Ziac contains a combination of hydrochlorothiazide and bisoprolol. Hydrochlorothiazide is a thiazide diuretic (water pill) that helps prevent your body from absorbing too much salt, which can cause fluid retention. Bisoprolol is a beta-blocker. Beta-blockers affect the heart and circulation (blood flow through arteries and veins). Ziac is used to treat high blood pressure (hypertension). Ziac may also be used for purposes not listed in this medication guide. You should not use Ziac if you are unable to urinate. You should not use this medicine if you have a serious heart condition such as "sick sinus syndrome" or "AV block," severe heart failure, or slow heartbeats that have caused you to faint. Learn more

Ziac Side Effects

Ziac Side Effects

Note: This document contains side effect information about bisoprolol / hydrochlorothiazide. Some of the dosage forms listed on this page may not apply to the brand name Ziac.

In Summary

More frequent side effects include: diarrhea, dizziness, headache, and rhinitis. See below for a comprehensive list of adverse effects.

For the Consumer

Applies to bisoprolol / hydrochlorothiazide: oral tablet

Along with its needed effects, bisoprolol/hydrochlorothiazide may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking bisoprolol / hydrochlorothiazide:

Less common

  • Bloating or swelling of the face, arms, hands, lower legs, or feet
  • chest pain or discomfort
  • lightheadedness, dizziness, or fainting
  • rapid weight gain
  • shortness of breath
  • slow or irregular heartbeat
  • tingling of the hands or feet
  • unusual tiredness or weakness
  • unusual weight gain or loss

Get emergency help immediately if any of the following symptoms of overdose occur while taking bisoprolol / hydrochlorothiazide:

Symptoms of overdose

  • Anxiety
  • blurred vision
  • burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
  • change in consciousness
  • chills
  • cold, clammy skin
  • cold sweats
  • confusion as to time, place, or person
  • cool, pale skin
  • cough
  • decrease in amount of urine
  • depression
  • difficulty breathing
  • dilated neck veins
  • dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  • drowsiness
  • dry mouth
  • extreme fatigue
  • fast or pounding heartbeat or pulse
  • fast, weak pulse
  • frequent urination
  • hallucinations
  • holding false beliefs that cannot be changed by fact
  • increased hunger
  • increased thirst
  • increased volume of pale, dilute urine
  • irregular breathing
  • irritability
  • loss of appetite
  • loss of consciousness
  • mood changes
  • muscle pain or cramps
  • nausea or vomiting
  • nervousness
  • nightmares
  • no breathing
  • noisy breathing
  • not able to pass urine
  • numbness or tingling in the hands, feet, or lips
  • pain or aching in the lower legs
  • seizures
  • shakiness
  • slurred speech
  • sweating
  • swelling of the face, hands, fingers, feet, ankles, or lower legs
  • tightness in the chest
  • trembling
  • troubled breathing
  • unconsciousness
  • unusual drowsiness, dullness, or feeling of sluggishness
  • unusual excitement, nervousness, or restlessness
  • very drowsy or sleepy
  • weakness and heaviness of legs
  • weight gain
  • wheezing

Some side effects of bisoprolol / hydrochlorothiazide may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common

  • Acid or sour stomach
  • belching
  • decreased interest in sexual intercourse
  • diarrhea
  • difficulty with moving
  • heartburn
  • inability to have or keep an erection
  • indigestion
  • joint pain
  • loss in sexual ability, desire, drive, or performance
  • muscle aching or stiffness
  • sleepiness
  • stomach discomfort, upset, or pain
  • swollen joints


  • Runny nose
  • sneezing
  • stuffy nose

For Healthcare Professionals

Applies to bisoprolol / hydrochlorothiazide: oral tablet


Frequency not reported side effects were seen with hydrochlorothiazide doses of generally 25 mg and higher.

The more commonly reported side effects observed with this drug are fatigue, dizziness, and diarrhea.


Common (1% to 10%): Bradycardia, chest pain, peripheral edema

Frequency not reported: Arrhythmia, peripheral ischemia


Frequency not reported: Bradycardia, palpitations, rhythm disturbances, cold extremities, claudication, hypotension, orthostatic hypotension, chest pain, congestive heart failure, exertional dyspnea, edema


Frequency not reported: Orthostatic hypotension, necrotizing angiitis, vasculitis

Orthostatic hypotension may be potentiated by alcohol, barbiturates, or narcotics.


Common (1% to 10%): Diarrhea, nausea, dyspepsia


Frequency not reported: Gastric pain, epigastric pain, abdominal pain, peptic ulcer, gastritis, dyspepsia, nausea, vomiting, diarrhea, constipation, dry mouth, mesenteric arterial thrombosis, ischemic colitis


Frequency not reported: Gastric irritation, constipation, pancreatitis, sialadenitis, dry mouth

Nervous system

Common (1% to 10%): Dizziness, somnolence

Frequency not reported: Headache


Frequency not reported: Unsteadiness, dizziness, vertigo, headache, syncope, paresthesia, hypoesthesia, hyperesthesia, somnolence, decreased concentration, decreased memory, tremor, taste abnormality, slightly clouded sensorium


Frequency not reported: Vertigo, paresthesia


Common (1% to 10%): Muscle cramps, myalgia


Frequency not reported: Arthralgia, muscle pain, joint pain, back pain, neck pain, muscle cramps, twitching


Frequency not reported: Cramping, muscle spasm


Common (1% to 10%): Cough, upper respiratory tract infection

Uncommon (0.1% to 1%): Rhinitis


Frequency not reported: Asthma, bronchospasm, bronchitis, dyspnea, pharyngitis, rhinitis, sinusitis, upper respiratory infection, sore throat, laryngospasm, respiratory distress


Frequency not reported: Respiratory distress, pneumonitis, pulmonary edema


Common (1% to 10%): Fatigue


Frequency not reported: Tinnitus, decreased hearing, earache, fatigue, asthenia, malaise, fever, aching


Frequency not reported: Weakness, fever


Common (1% to 10%): Impotence


Frequency not reported: Impotence, polyuria, Peyronie's disease


Frequency not reported: Sexual dysfunction


Uncommon (0.1% to 1%): Hypokalemia

Frequency not reported: Increased uric acid, increased serum triglycerides, decreased HDL


Frequency not reported: Gout, weight gain, increased serum triglycerides, increased uric acid, increased serum potassium, increased glucose, increased phosphorus


Common (1% to 10%): Hypokalemia

Frequency not reported: Anorexia, gout, hyperglycemia, hyperuricemia, hyperlipidemia, hypercalcemia, increased uric acid, other electrolyte imbalances

Bisoprolol: Uric acid, serum potassium, glucose, and phosphorus increases associated with use of this drug were not of clinical importance and rarely resulted in discontinuation.


Frequency not reported: Insomnia, loss of libido


Frequency not reported: Sleep disturbance, vivid dreams, insomnia, depression, anxiety, restlessness, decreased libido, hallucination, disorientation to time and space, emotional lability


Frequency not reported: Restlessness


Of the 15% of patients who converted to a positive ANA status, one-third of the patients converted back to a negative ANA titer with continued use.


Very common: Antinuclear antibody (ANA) conversions to a positive titer (up to 15%)



Frequency not reported: Cystitis, renal colic, increased creatinine, increased BUN


Frequency not reported: Renal failure, renal dysfunction, interstitial nephritis, glycosuria

Creatinine and BUN were associated with slightly increased levels, but these effects were generally not of clinical importance and rarely resulted in discontinuation.



Frequency not reported: Rash, acne, eczema, psoriasis, skin irritation, pruritus, flushing, sweating, alopecia, dermatitis, cutaneous vasculitis, exfoliative dermatitis


Frequency not reported: Photosensitivity, rash, cutaneous vasculitis, erythema multiforme, Stevens-Johnson syndrome, exfoliative dermatitis, toxic epidermal necrolysis



Frequency not reported: Visual disturbances, ocular pain, ocular pressure, abnormal lacrimation


Frequency not reported: Transient blurred vision, xanthopsia



Frequency not reported: Purpura, decreased WBCs, decreased platelets, eosinophilia, agranulocytosis, thrombocytopenia


Frequency not reported: Purpura, leukopenia, agranulocytosis, thrombocytopenia, aplastic anemia, hemolytic anemia

During treatment with this drug, eosinophilia and decreased levels of WBCs and platelets were not of clinical importance and rarely resulted in discontinuation.



Frequency not reported: Angioedema


Frequency not reported: Urticaria, anaphylactic reactions


SGOT and SGPT elevations of 1 to 2 times the upper limit of normal were reported in 6.2% of patients, with a multiple occurrence rate of 1.9%. Generally, this increase was the result of underlying disorders or resolved with continued use of this drug.


Common (1% to 10%): Increased serum glutamic oxaloacetic transaminase (SGOT) and serum glutamic pyruvic transaminase (SGPT)


Frequency not reported: Intrahepatic cholestatic jaundice, cholecystitis

Editorial References and Review

Medically reviewed by BestRx Medical Team Last updated on 1/1/2020.

Source: Drugs.com Ziac