Zinc sulfate
Brand names: Solvazinc, Z Span Spansule
Zinc sulfate is an oral zinc salt used as a mineral supplement to treat or prevent zinc deficiency, including in malabsorption, prolonged parenteral nutrition and conditions such as acrodermatitis enteropathica.
Adult dose
Paediatric dose
Dose adjustments
No dose adjustment is stated in the fetched sections. §4.4 verbatim: 'Accumulation of zinc may occur in cases of renal failure.'
Not stated — the fetched SPC sections (§4.2–4.6, §4.8) contain no hepatic impairment advice.
Dose auto-extracted from UK Summary of Product Characteristics (SPC) via the eMC; US FDA prescribing information (openFDA / DailyMed) — cross-check; US labelling may differ from UK — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.
Contraindications
- Hypersensitivity to the active substance or to any of the excipients listed in section 6.1 (§4.3)
- Copper deficiency (§4.3, cross-referring to §4.5)
Side effects
- Abdominal pain, dyspepsia, nausea, vomiting, diarrhoea, gastric irritation and gastritis — §4.8 verbatim: 'Zinc salts may cause abdominal pain, dyspepsia, nausea, vomiting, diarrhoea, gastric irritation and gastritis.'
- Irritability, headache and lethargy — §4.8 verbatim: 'There have also been cases of irritability, headache and lethargy observed.'
- Reduced copper levels and potentially copper deficiency; §4.8 states the risk 'may be greater with long-term treatment (e.g. if zinc deficiency is no longer present) and/or with higher doses of zinc'
- Neurological features of copper deficiency (§4.8): polyneuropathy, symptoms of which can include gait disturbances, ataxia and paraesthesia and/or hypoaesthesia
- Haematological features of copper deficiency (§4.8): anaemia, neutropenia, leucopenia and pancytopenia
Monitoring
- The fetched SPC sections specify NO laboratory monitoring — neither serum zinc nor serum copper levels are mentioned anywhere in the bundle. The items below are the clinical checks the SPC's own wording calls for.
- Review the need to continue treatment — §4.4 verbatim: 'Therapy should continue until clinical improvement occurs and Solvazinc can be replaced by dietary measures unless there is severe malabsorption, metabolic disease or continuing zinc loss.'
- Watch for copper deficiency on long-term treatment or higher doses (§4.4 and §4.8) — neurological features (polyneuropathy: gait disturbance, ataxia, paraesthesia/hypoaesthesia) and haematological features (anaemia, neutropenia, leucopenia, pancytopenia)
- Renal impairment — §4.4 verbatim: 'Accumulation of zinc may occur in cases of renal failure.'
Clinical monograph
How it works
Zinc is an essential trace element that acts as a cofactor for numerous metalloenzymes and is required for normal wound healing, immune function, taste and growth; supplementation replenishes depleted stores.
Prescribing in practice
- Prolonged or high-intake zinc supplementation can precipitate copper deficiency (with anaemia and neutropenia), so duration and need should be reviewed and copper status considered.
- Zinc reduces absorption of oral iron, tetracyclines and quinolone antibiotics, and these should be separated in timing.
- Gastrointestinal upset is common; taking it with or after food improves tolerability though absorption is somewhat reduced.
Monitoring
Monitor for clinical response and, with prolonged use, consider periodic assessment of copper and haematological indices.
Counselling the patient
- Take separately from iron tablets and certain antibiotics, leaving a gap between doses.
- Report any unexplained tiredness or recurrent infections during long-term use.
- Do not continue indefinitely without review.
Evidence & guidelines
Use is supported by established trace-element guidance and the product SPC rather than a single landmark trial.
Reference: BAPEN guidelines; Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).
Related
Curated clinical cross-links plus same-class fallbacks.
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- Pre-op Medical Clearance · NICE NG45; ESC 2022
- Secondary Hypertension Workup · NICE NG136; ESH 2023