Statins and CKD

Cardiovascular disease (CVD) is the silent killer in CKD:

• People with CKD are 10× more likely to die of a heart attack than reach dialysis
• Even early CKD (stage 3a) doubles CVD risk
• Lipid problems in CKD are atypical: triglycerides often raised, HDL often low, LDL may be 'normal' but particles are smaller and more atherogenic
• Traditional QRISK calculators UNDERESTIMATE risk in CKD

Landmark evidence:

• SHARP trial (2011): simvastatin + ezetimibe reduced major atherosclerotic events by 17% in 9,000 CKD patients
• Multiple meta-analyses confirm benefit at all eGFR levels

NICE NG181 (2023): offer atorvastatin 20 mg to all adults with CKD for primary OR secondary CV prevention, regardless of QRISK score.

ATORVASTATIN — UK FIRST-LINE:

• 20 mg daily for primary prevention
• 80 mg daily for secondary prevention (previous MI/stroke/PVD)
• No dose reduction needed at any eGFR
• Liver-metabolised — kidney function doesn't matter
• Take any time of day

Rosuvastatin

• Reduce to max 20 mg if eGFR 30–60
• Reduce to max 10 mg if eGFR < 30
• Useful if atorvastatin intolerant

Simvastatin

• Max 40 mg in CKD
• Many drug interactions (avoid with amlodipine > 5 mg, amiodarone)
• Older first-line; now superseded by atorvastatin

Pravastatin Or Fluvastatin

• Hydrophilic — less muscle side effects
• Useful in dialysis patients
• Lower potency

On Dialysis

• 4D and AURORA trials showed no mortality benefit of statins started AFTER dialysis began
• BUT statins started before dialysis should be continued
• UK practice: continue or start cautiously; benefits in CVD prevention often outweigh weak mortality data

Post-transplant

• Statins reduce CV events
• Fluvastatin preferred (less interaction with calcineurin inhibitors)
• Atorvastatin acceptable with tacrolimus

Truly Common

• Muscle aches (~5%) — usually mild, often nocebo (expecting them)
• Mildly raised liver enzymes (1%) — rarely matters

Uncommon

• Type 2 diabetes — small increased risk (~9% relative) but CV benefit far outweighs
• Mild memory complaints — not confirmed in trials
• Sleep disturbance with simvastatin

Rare

• Myopathy (CK > 10× upper limit): ~1 in 1,000
• Rhabdomyolysis: ~1 in 10,000

Myths

• 'Statins damage kidneys' — NO. They protect.
• 'Natural alternatives are as good' — Red yeast rice is a low-dose statin with unregulated content. Plant sterols help mildly.
• 'Once you start you can never stop' — Not true.

ABSOLUTE RISKS at standard doses are TINY compared with the heart-attack-prevention benefit.

STEP 1 — Confirm:

• Are the aches in big muscle groups (thigh, shoulder, calf)?
• Did they start within 4 weeks of starting the statin?
• Check vitamin D (low levels mimic statin myopathy)
• Check thyroid (low T4 mimics myopathy)
• Check CK blood test if severe

STEP 2 — Approach:

• Try continuing 2 weeks — many aches settle
• Halve the dose temporarily
• Try alternate-day dosing (atorvastatin or rosuvastatin work this way)
• Switch to a different statin (rosuvastatin or pravastatin often tolerated)
• Top up vitamin D if low
• Stop drugs that worsen statin levels (clarithromycin, fluconazole — interactions)

STEP 3 — If genuinely statin-intolerant:

• Ezetimibe 10 mg (well tolerated, modest LDL reduction)
• PCSK9 inhibitors (alirocumab, evolocumab) — injection, NICE-approved in CKD if very high CV risk
• Inclisiran (twice-yearly injection) — newer option
• Bempedoic acid — newer oral option

Before Starting

• Baseline lipids, liver enzymes, CK (optional unless symptomatic)
• Check for drug interactions (clarithromycin, ciclosporin, amiodarone, etc.)
• Discuss what to expect

After Starting

• Lipids at 3 months — expect ≥ 40% LDL reduction
• LFTs at 3 and 12 months
• Annual review thereafter
• CK only if muscle symptoms

Targets

• Non-HDL cholesterol > 40% reduction from baseline (NICE)
• Or LDL < 1.8 mmol/L if very high risk (post-MI, diabetes + CKD)

Drug Interactions To Watch

• Clarithromycin/erythromycin — pause statin during course
• Fluconazole/itraconazole — pause or reduce
• Ciclosporin — switch to fluvastatin (post-transplant)
• Amlodipine > 5 mg + simvastatin = avoid
• Grapefruit juice + simvastatin or atorvastatin = avoid