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Ketosteril bevat ketoanalogues + essential amino acids 630 mg made by Fresenius Kabi. It is used for nutritional support in chronic kidney disease (CKD) when used alongside a low-protein diet to delay disease progression and reduce uraemic symptoms. Take exactly as directed by your clinician — do not adjust the dose yourself.
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⚠ Important — this is a supplement, not an alpha-blocker or BPH medicine
Ketosteril is a renal nutritional supplement, not a treatment for an enlarged prostate or overactive bladder. It is used in adults with stage 3–5 CKD on a protein-restricted diet (~0.4–0.6 g/kg/day). If you are looking for a medicine for prostate or bladder symptoms, please use the alternatives panel at the bottom of this page.
What Ketosteril is and how it works
Ketosteril contains a fixed mix of ketoanalogues (nitrogen-free analogues of essential amino acids) and a smaller amount of essential amino acids. In CKD, dietary protein restriction reduces uraemic toxin generation but risks malnutrition. The ketoanalogues let the body manufacture amino acids by adding the patient’s own circulating nitrogen waste — so essential nutrition is preserved while urea load and uraemic symptoms (nausea, fatigue, itch) drop.
The combination is designed for use alongside a low-protein diet (typically 0.4–0.6 g/kg/day under dietitian supervision). It is not effective and may even worsen things on a normal-protein diet because excess nitrogen is then loaded back in.
Dosering en hoe in te nemen
| Patiëntengroep | Aanbevolen dosering |
|---|---|
| Adults > 70 kg with stage 3–5 CKD on low-protein diet | 4–8 tablets three times daily with main meals (12–24 tablets/day) per dietitian / nephrologist plan |
| Adults 40–70 kg | 1 tablet per 5 kg body weight per day, divided across meals |
| Children > 3 years (specialist supervision) | 1 tablet per 5 kg/day |
| End-stage CKD on dialysis | Specialist-guided; usually combined with intradialytic protein matching |
Swallow whole with the main meal so the amino acids are available alongside dietary nitrogen sources. Do not crush or chew. Tablets are large; some users prefer to space them through a meal rather than take all at once. Ensure you are also drinking enough water unless your nephrologist has restricted fluids.
Monitoring
- Serum calcium — ketoanalogues contain calcium; check at baseline and every 1–3 months. Stop if hypercalcaemia (> 2.6 mmol/L)
- Serum phosphate, PTH, eGFR, BUN/urea — routine CKD monitoring
- Body weight, MUAC and dietary protein intake — via dietitian to confirm adequate nutrition is maintained
- Albumin, prealbumin — if malnutrition is suspected
Bijwerkingen
| Bijwerking | Frequentie | Opmerkingen |
|---|---|---|
| Hypercalciëmie | Uncommon — stop if > 2.6 mmol/L | Check calcium periodically |
| GI upset (nausea, fullness) | Common at first | Take with food; spread doses |
| Obstipatie | Minder vaak | Adequate fluid (within renal limits) and fibre |
| Hypersensitivity (rash, itch) | Zeldzaam | Stop and review |
Geneesmiddelinteracties
| Combinatie | Effect | Actie |
|---|---|---|
| Aluminium-containing antacids | Calcium can increase aluminium absorption | Avoid concurrent dosing — separate by 2 hours |
| Tetracyclines, fluoroquinolones, levothyroxine, oral iron, bisphosphonates | Calcium chelation reduces absorption of co-dose | Minimaal 2 uur tussen innames |
| Cardiac glycosides (digoxin) | High calcium increases digoxin sensitivity | Monitor; do not start concurrent calcium supplements |
| Vitamin D analogues, calcium supplements | Additive risk of hypercalcaemia | Specialistische begeleiding |
Who should not take Ketosteril
- Hypercalcaemia (corrected serum calcium > 2.6 mmol/L)
- Disorders of amino-acid metabolism (e.g. maple syrup urine disease, hereditary phenylketonuria)
- Patients NOT on a structured low-protein diet (no benefit and possible nitrogen overload)
- Severe galactose intolerance / Lapp lactase deficiency (excipient)
- Hypersensitivity to any constituent
Veelgestelde vragen
Is Ketosteril a treatment for prostate or bladder problems?
Nee. It is a kidney-disease nutritional supplement — ketoanalogues plus essential amino acids — for use with a low-protein diet to delay CKD progression and reduce uraemic symptoms. Bladder/prostate medications are listed in the alternatives panel at the bottom of this page.
How does the low-protein diet plus Ketosteril actually slow CKD?
Less dietary nitrogen means less urea generation; the kidneys handle less waste; glomerular hyperfiltration drops. Adding ketoanalogues lets the body still build essential amino acids using circulating nitrogen waste, so nutritional status stays adequate. Trials show eGFR decline slows in stages 3–5 CKD on a structured protein-restricted diet plus ketoanalogues.
How many tablets per day?
Roughly 1 tablet per 5 kg of body weight per day, divided across the three main meals. A 70 kg adult typically takes 4–5 tablets at each meal (~12–14/day). Your nephrologist or dietitian will fine-tune.
Why with meals?
Ketoanalogues need an immediate source of nitrogen to be converted into essential amino acids. Taking them with meals provides that nitrogen and improves bioavailability.
Will I gain weight or muscle from this?
Ketosteril provides amino-acid building blocks but is not a high-calorie supplement. Maintenance of weight and muscle on a low-protein diet depends on adequate calories overall. A renal dietitian will plan calories around the protein restriction.
What about dialysis — do I still need it?
Most haemodialysis programmes match a more liberal dietary protein intake (1.0–1.2 g/kg/day) to dialysate amino-acid losses. Specialist supervision is needed; do not self-adjust.
Can I stop my phosphate binder?
No. Ketosteril does not bind dietary phosphate. Continue your prescribed binder (sevelamer, calcium acetate, lanthanum) at meal times unless your nephrologist says otherwise.
How is calcium measured and watched?
Corrected serum calcium is checked at baseline and every 1–3 months. If it rises above 2.6 mmol/L, the dose is reduced or stopped. Avoid concurrent calcium supplements unless your specialist directs.
Are there alternatives if I cannot tolerate Ketosteril?
Yes — structured low-protein diets without ketoanalogues, or alpha-keto acid mixtures with different ratios. The decision is individualised; ask your renal dietitian.
What other meds should I separate from this?
Tetracyclines, fluoroquinolones, levothyroxine, oral iron, bisphosphonates and aluminium-containing antacids should be taken at least 2 hours apart from Ketosteril because of calcium chelation.
Andere blaas- en prostaatmedicijnen
- Silofast (silodosin) — alpha-blocker for BPH
- Alfusin (alfuzosin 10 mg ER) — alpha-blocker for BPH
- Cystone — herbal urinary support, kidney-stone adjunct
- Urotel XL (tolterodine ER) — for OAB symptoms
- Fosirol 3 g (fosfomycin) — for an acute UTI episode
Medisch disclaimer. De informatie op deze pagina is alleen voor algemene educatieve doeleinden en is geen vervanging voor advies van een gekwalificeerde clinicus. Overleg altijd met uw arts of apotheker over nieuwe medicatie of doseringswijzigingen, vooral als u zwanger bent, borstvoeding geeft, andere medische aandoeningen heeft of andere medicijnen gebruikt.




























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