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Lozol Side Effects

Generic Name: indapamide

Note: This page contains information about the side effects of indapamide. Some of the dosage forms included on this document may not apply to the brand name Lozol.

For the Consumer

Applies to indapamide: oral tablet, oral tablet extended release

In addition to its needed effects, some unwanted effects may be caused by indapamide (the active ingredient contained in Lozol). In the event that any of these side effects do occur, they may require medical attention.

Severity: Moderate

If any of the following side effects occur while taking indapamide, check with your doctor or nurse as soon as possible:

Signs and symptoms of an imbalance of water or potassium in the body
  • Dryness of mouth
  • increased thirst
  • irregular heartbeat
  • mood or mental changes
  • muscle cramps or pain
  • nausea or vomiting
  • unusual tiredness or weakness
  • weak pulse
  • Skin rash, itching, or hives

Minor Side Effects

Some of the side effects that can occur with indapamide may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

Less common or rare:
  • Diarrhea
  • dizziness or lightheadedness, especially when getting up from a lying or sitting position
  • headache
  • loss of appetite
  • trouble in sleeping
  • stomach upset

For Healthcare Professionals

Applies to indapamide: compounding powder, oral tablet


Most adverse side effects are mild and transient.[Ref]


Dermatologic reactions, such as rashes, occur in less than 5% of patients, and comprise up to 36% of all adverse drug reactions associated with indapamide (the active ingredient contained in Lozol) [Ref]


Metabolic abnormalities are common, but are rarely clinically significant. Hypokalemia occurs in 15% of patients, although clinically relevant hypokalemia is reported in only 1% and 3% of patients receiving 2.5 and 5.0 mg/day, respectively. Hyponatremia, hyperglycemia, and hyperuricemia are reported in 1% to 5% of patients but are rarely clinically relevant. Unlike the thiazides, indapamide (the active ingredient contained in Lozol) has little or no adverse effect on the lipid profile. Severe cases of hyponatremia, accompanied by hypokalemia have been reported with recommended doses of indapamide in elderly females.[Ref]


Renal side effects are unusual, consisting primarily of azotemia.[Ref]

A case of interstitial nephritis and an urticarial rash associated with indapamide has been reported.[Ref]


Gastrointestinal side effects include dyspepsia, constipation, diarrhea, flatulence, and dry mouth in less than 5% of patients.[Ref]

Nervous system

Nervous system side effects include dizziness, lightheadedness, headache, and fatigue in 5% of patients.[Ref]


Cardiovascular side effects are usually limited to postural hypotension. Indapamide (the active ingredient contained in Lozol) does not affect the heart rate.[Ref]


Musculoskeletal cramps are reported in about 5% of patients. A single case of skeletal muscle damage has been associated with indapamide (the active ingredient contained in Lozol) [Ref]

A 71-year-old woman with a history of psychiatric problems and reflux esophagitis developed chest pain, finger numbness, sweating, and nausea while gardening. Her medications included indapamide, trifluoperazine, oxazepam, and ranitidine. Myocardial infarction was definitively ruled out by ECG and CPK isoenzyme analysis. Interesting laboratory values included a reduced serum sodium (117 mmol/L), elevated LDH and AST enzymes, and elevated CPK-MM isoenzymes. There was no history of muscular trauma, and thyroid function tests were normal. The hyponatremia and elevated CPK-MM fractions fell precipitously upon hydration with normal saline. A definite causal link between indapamide and rhabdomyolysis could not be made, but thiazide diuretics have been previously implicated in some cases of hypokalemia with subsequent muscle damage.[Ref]


Genitourinary side effects generally reflect the activity of the drug, with less than 5% of patients reporting polyuria and nocturia.[Ref]

Decreased sexual libido is rare, with up to 88% of patients reporting no change and most of the remaining 12% reporting improvement of sexual libido during indapamide therapy.[Ref]


A case of reversible hepatitis associated with indapamide (the active ingredient contained in Lozol) has been reported.[Ref]

Hepatic side effects are rare, at least one case of hepatitis has been reported.[Ref]


Hypersensitivity reactions occur in less than 5% of patients. Cases of severe reactions including toxic epidermal necrolysis, erythema multiforme, and Stevens-Johnson syndrome have been reported. Patients with a sulfa allergy may react to indapamide (the active ingredient contained in Lozol) [Ref]


Endocrine side effects include at least one case of indapamide-induced hyperparathyroidism. In one study, indapamide (the active ingredient contained in Lozol) significantly reduced parathyroid hormone levels in all patients.[Ref]


Hematologic side effects are rare, but have included at least one case of mild thrombocytopenia and mucosal bleeding from the tongue. Bleeding stopped promptly and platelet counts returned to normal following discontinuation of indapamide (the active ingredient contained in Lozol) [Ref]


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27. Hasanova EA, Agasiyeva NE "Bleeding associated with indapamide SR therapy." Ann Pharmacother 38 (2004): 199-200

Not all side effects for Lozol may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.