Combined calcium + vitamin D
Ergocalciferol with calcium lactate and calcium phosphate
Brand names: Calcium with Vitamin D
Adult dose
Dose: 1–2 tablets OD
Route: Oral
Frequency: OD–BD
Clinical pearls
- Adjunct in osteoporosis prevention/treatment
- NICE NG121 / Royal Osteoporosis Society: ensure intake equivalent to 800–1000 IU vitamin D and 1000–1200mg calcium daily
Contraindications
- Hypercalcaemia
- Severe renal impairment
- Renal stones
Side effects
- Constipation
- Hypercalcaemia
- GI upset
Interactions
- Thiazides
- Tetracyclines/quinolones (chelation — separate)
- Levothyroxine (separate by 4h)
- Bisphosphonates (separate dosing)
Monitoring
- Calcium (if symptomatic)
- Renal function
Reference: BNF; NICE NG121; Royal Osteoporosis Society; https://bnf.nice.org.uk/drugs/ergocalciferol-with-calcium-lactate-and-calcium-phosphate/. Verify against your local formulary and the latest BNF before prescribing.
Related
Curated clinical cross-links plus same-class fallbacks.
Calculators
- Parkland Formula for Burns Fluid Resuscitation · Burns
- Hyperkalaemia Management Algorithm · Electrolyte Disorders
- FAST Exam Protocol — Focused Assessment with Sonography in Trauma · Trauma
- Corrected Calcium · Electrolytes
- Calcium-Phosphate Product · Electrolytes
- Corrected Calcium (for Albumin) · Electrolytes
Pathways
- Sepsis Screening and Sepsis Six · UK Sepsis Trust; NICE NG51; Surviving Sepsis Campaign 2021
- Unintentional Weight Loss Workup · NICE NG12; BSG
- Chronic Fatigue Workup · NICE NG206; BMJ Best Practice
- Lymphadenopathy Workup · NICE NG12; BMJ Best Practice
- Pre-op Medical Clearance · NICE NG45; ESC 2022
- Secondary Hypertension Workup · NICE NG136; ESH 2023