zoledronic acid monohydrate: clinical use

Prescribing considerations

• Confirm that the indication matches the selected osteoporosis or Paget’s disease licence.
• Calculate creatinine clearance using actual body weight before administration and review renal risk factors, nephrotoxic medicines, diuretics and hydration.
• Correct hypocalcaemia and other mineral-metabolism disturbances before treatment; ensure appropriate calcium and vitamin D intake.
• Assess oral health and osteonecrosis risk factors. Delay initiation when unhealed oral soft-tissue lesions are present.
• Avoid concurrent zoledronic acid products or other bisphosphonates.

Contraindications and cautions

• Hypersensitivity to zoledronic acid, another bisphosphonate or an excipient
• Hypocalcaemia
• Severe renal impairment with creatinine clearance below the product threshold
• Pregnancy or breastfeeding

Monitoring

• Renal function and calculated creatinine clearance before administration; consider additional creatinine monitoring in at-risk patients
• Calcium status, particularly in Paget’s disease or where parathyroid reserve or intestinal absorption may be impaired
• Hydration and post-infusion symptoms that could cause fluid loss
• Oral symptoms and dental health
• New thigh, hip or groin pain suggesting an incomplete atypical femoral fracture

Clinical pharmacology

A potent nitrogen-containing bisphosphonate with high affinity for mineralised bone. It inhibits osteoclast farnesyl pyrophosphate synthase, is not systemically metabolised through CYP enzymes and is cleared by the kidneys, with a proportion retained in bone.

Formulation and product differences

• The selected product is a clear, colourless, ready-to-use solution in an infusion bag.
• It contains mannitol, sodium citrate and water for injections and is essentially sodium-free.
• It is for single use and must not be mixed with other medicinal products or allowed to contact calcium-containing solutions.

Solution for infusion

Route: Intravenous

Strengths: 4 mg/100 mL, 4 mg/5 mL, 5 mg, 5 mg/100 mL