This site is intended for UK healthcare professionals
Medscape UK Univadis Logo
Medscape UK Univadis Logo

Simvastatin oral

Updated 2 Feb 2023 | Statins

Presentation

Oral formulations of simvastatin.

Drugs List

  • simvastatin 10mg tablets
  • simvastatin 20mg tablets
  • simvastatin 20mg/5ml oral suspension sugar-free
  • simvastatin 40mg tablets
  • simvastatin 40mg/5ml oral suspension sugar-free
  • simvastatin 80mg tablets
  • ZOCOR 10mg tablets
  • ZOCOR 20mg tablets
  • ZOCOR 40mg tablets
  • Therapeutic Indications

    Uses

    Combined hyperlipidaemia: lipid lowering therapy adjunct to diet
    Coronary heart disease: Reduce risk of morbidity/mortality
    Diabetes mellitus: Reduce cardiovascular morbidity/mortality
    Heterozygous familial hypercholesterolaemia: Adjunct to diet
    Homozygous familial hypercholesterolaemia: reduction of cholesterol
    Treatment of primary hypercholesterolaemia resistant to diet

    Adjunctive treatment of primary hypercholesterolaemia or mixed dyslipidaemia with dietary measures when response to diet and other non-pharmacological treatments (e.g. exercise and weight reduction) is inadequate.

    Adjunctive treatment of homozygous familial hypercholesterolaemia with diet and other lipid lowering treatments (e.g. LDL apheresis) or if such treatments are not appropriate.

    Reduction of cardiovascular mortality and morbidity as an adjunct to correction of other risk factors and cardioprotective therapy, in patients with manifest atherosclerotic cardiovascular disease or diabetes mellitus with normal or increased cholesterol levels.

    Dosage

    Patients should be placed on a standard cholesterol-lowering diet before receiving simvastatin and should continue on this diet during treatment.

    Adults

    Prevention of cardiovascular event
    20mg to 40mg daily, given as a single dose in the evening in patients at high risk of coronary heart disease with or without hyperlipidaemia.
    Adjustments of dosage, if required, should be made at intervals of not less than four weeks.
    Maximum dose: 80mg daily. This dose is only recommended in patients with severe hypercholesterolaemia and high risk for cardiovascular complication who have not achieved their treatment goals on lower doses and when benefits are expected to outweigh the potential risks.

    Hypercholesterolaemia
    Initial dose: 10mg to 20mg once a day in the evening. Patients requiring a large reduction in LDL-cholesterol (greater than 45%) may be started on 20mg to 40mg once daily. A dose of 5mg daily in combination with non-pharmacological measures (e.g. exercise, diet and weight reduction) may be suitable for patients with less severe hypercholesterolaemia.
    Adjustments of dosage, if required, should be made at intervals of not less than four weeks.
    Maximum dose: 80mg daily. This dose is only recommended in patients with severe hypercholesterolaemia and high risk for cardiovascular complication who have not achieved their treatment goals on lower doses and when benefits are expected to outweigh the potential risks.

    Homozygous familial hypercholesterolaemia
    40mg daily, taken as a single dose in the evening.
    Simvastatin should be used as an adjunct to other lipid lowering treatments (e.g. LDL apheresis) in these patients or if such treatments are unavailable.

    The following alternative dosing schedule may be suitable:
    Initial dose: 40mg once daily at night. Adjust at intervals of at least four weeks.
    Maximum dose: 80mg once daily at night.

    Children

    Heterozygous familial hypercholesterolaemia:
    Children aged 10 to 18 years (boys Tanner Stage II and above, and girls who are at least one year post-menarche)
    Initial dose: 10mg once daily in the evening.
    Maintenance dose: 10mg to 40mg daily. Doses should be individualised according to the recommended goal of therapy as recommended by the paediatric treatment recommendations. Adjustments should be made at intervals of four weeks or more. The experience of simvastatin in pre-pubertal children is limited.

    Hyperlipidaemia including familial hypercholesterolaemia
    Children aged 5 to 10 years (unlicensed)
    Initial dose: 10mg once daily in the evening. Increase at intervals of at least four weeks if necessary.
    Maximum dose: 20mg once daily in the evening.

    Patients with Renal Impairment

    Adult
    In patients with severe renal insufficiency (creatinine clearance below 30ml/minute), dosages above 10mg/day should be implemented cautiously.

    The Renal Drug Handbook suggests the following doses:

    GFR 20 to 50ml/minute: Dose as in normal renal function
    GFR 10 to 20ml/minute: Dose as in normal renal function
    Less than 10ml/minute: 10mg to 20mg daily. In severe renal impairment doses above 10mg should be used with caution (doses up to 40mg daily have been used).

    Patients with Hepatic Impairment

    Simvastatin is contraindicated in patients with severe hepatic impairment, active liver disease or unexplained persistent elevations in serum transaminases.

    Contraindications

    Children under 5 years
    Creatine kinase levels over 5 times upper limit of normal
    Within 7 days of discontinuing fusidic acid
    Breastfeeding
    Myopathy
    Pregnancy
    Serum transaminases above 3 times upper limit of normal
    Severe hepatic impairment
    Unexplained elevated serum transaminases

    Precautions and Warnings

    Asian ancestry
    Children aged 5 to 10 years
    Family history of hereditary muscular disorders
    Females of childbearing potential
    High alcohol intake
    Major surgery
    Patients over 65 years
    Severe trauma
    Galactosaemia
    Glucose-galactose malabsorption syndrome
    Hereditary muscular disorder
    History of hepatic impairment
    History of muscular toxicity secondary to fibrates
    History of muscular toxicity secondary to HMG-CoA reductase inhibitors
    History of non-traumatic rhabdomyolysis
    Hypothyroidism
    Lactose intolerance
    Renal impairment - creatinine clearance below 30 ml/minute

    Advise ability to drive/operate machinery may be affected by side effects
    Correct hypothyroidism before treatment
    Exclude secondary causes of hypercholesterolaemia before treatment
    Not all available brands are licensed for all age groups
    Not all available brands are licensed for all indications
    Some formulations contain lactose
    Measure creatine kinase levels prior to treatment if risk of rhabdomyolysis
    Perform liver function tests before commencing therapy
    Monitor blood glucose in high risk patients
    Monitor creatine kinase levels in patients at risk of rhabdomyolysis
    Monitor creatine kinase levels in patients reporting myalgia
    Repeat liver function tests within 3 months and at 12 months
    Advise patient to report any symptoms of interstitial lung disease
    Advise patients to report muscle pain/tenderness/weakness
    Advise patients to report signs of hepatic damage (malaise, jaundice etc.)
    Discontinue if jaundice or other clinical symptoms of hepatic injury
    Discontinue if myopathy is suspected
    Advise patient to seek advice at first indications of pregnancy
    Discontinue if ALT level exceed 3 times the upper limit of normal & persist
    Discontinue if AST level exceed 3 times the upper limit of normal & persist
    Discontinue if creatine kinase levels >5 times upper limit of normal
    Discontinue if evidence of interstitial lung disease
    Discontinue if muscular symptoms are severe
    Discontinue prior to surgery
    Advise patient grapefruit products may increase plasma level
    Dietary restrictions should be maintained
    Female: Contraception required during and for 3 months after treatment

    Statin therapy has been associated with the development of myalgia, myopathy and rhabdomyolysis, which can rarely be fatal. Myopathy is dose related.
    Routine monitoring of creatinine kinase is not necessary in asymptomatic patients.

    Do not measure creatine kinase levels following strenuous exercise or in the presence of other factors affecting CK levels. If CK is greater than 5 times the upper limit of normal (ULN) levels prior to treatment, re-measure 5 to 7 days later.

    If symptoms of myopathy resolve and levels of creatinine kinase reduce, treatment can be reinitiated at the lowest dose and with close monitoring.

    Cases of interstitial lung disease have been reported with some statins, especially in long-term therapy. If the patient presents with signs or symptoms of interstitial lung disease including dyspnoea, non-productive cough, or deterioration of general health (fatigue, weight loss, fever), treatment should be discontinued.

    Some evidence suggests that statins as a class raise blood glucose and in some patients, at a high risk of future diabetes, may produce a level of hyperglycaemia where formal diabetes care is appropriate. This risk, however, is outweighed by the reduction in vascular risk with statins and therefore should not be a reason for stopping statin treatment. Patients at risk (raised fasting glucose, raised body mass index at baseline, history of hypertension and raised triglycerides)should be monitored both clinically and biochemically according to national guidelines.

    Rare cases of myopathy/rhabdomyolysis have been associated with concomitant administration of HMG-CoA reductase inhibitors and lipid-modifying doses (greater than or equal to 1g/day) of niacin (nicotinic acid), either of which can cause myopathy when given alone.

    Coadministration of simvastatin with lipid-modifying doses (greater than or equal to 1g/day) of niacin (nicotinic acid) is not recommended in Asian patients.

    There have been very rare reports of an immune mediated necrotizing myopathy (IMNM) during or after treatment with some statins. IMNM is clinically characterised by persistent proximal muscle weakness and elevated serum creatine kinase, which persist despite discontinuation of statin treatment.

    The risk of myopathy is greater on simvastatin 80mg and should only be used in patients with severe hypercholesterolaemia and at high risk for cardiovascular complications. If an interacting agent is needed, an alternative statin based regimen with less potential for drug-drug interactions should be used.

    Patients carrying the SLC01B1 gene allele (c.521T>C) have an increased systemic exposure of simvastatin and increased risk of myopathy. Where available, genotyping for the presence of the C allele should be considered prior to prescribing high dose simvastatin and high doses avoided in patients with the CC genotype.

    If serious liver injury with clinical symptoms and/or hyperbilirubinaemia or jaundice occurs during treatment with simvastatin, promptly interrupt therapy. If an alternate etiology is not found, do not restart treatment.

    Pregnancy and Lactation

    Pregnancy

    Simvastatin is contraindicated during pregnancy.

    A mixture of human malformations have been reported with the used of statins in the first trimester, these include; VATER-association, neural tube defects, holoprosencephaly, other CNS malformations and limb abnormalities (Schaefer, 2007). None of these malformations have occurred in significant enough quantities to enable causality to be concluded. However, the theoretical risks of reducing cholesterol availability during embryo development should be considered since simvastatin may reduce the foetal levels of mevalonate which is a precursor of cholesterol biosynthesis. The suspension of treatment throughout pregnancy is not considered likely to have a detrimental effect on the long term course of hyperlipidaemia. For these reasons simvastatin should not be used during pregnancy. Schaefer (2007) concludes that inadvertent treatment with a statin during pregnancy, does not require a termination of pregnancy, however, treatment should be stopped immediately and a detailed ultrasound examination should considered.

    Advise female patients of child bearing potential to take adequate contraceptive measures during treatment and for three months after discontinuation (NICE guideline no.71).

    The use of all medication in pregnancy should be avoided whenever possible; particularly in the first trimester. Non-drug treatments should also be considered. When essential, a medication with the best safety record over time should be chosen, employing the lowest effective dose for the shortest possible time. Polypharmacy should be avoided. Teratogens taken in the pre-embryonic period, often quoted as lasting until 14-17 days post-conception, are believed to have an all-or-nothing effect. Where drugs have a short half-life, and when the date of conception is certain, this may allow women to be reassured where drug exposure has occurred within this time frame. Further advice may be available from the UK National Teratology Information Service (NTIS) and through ToxBase, available via password on the internet ( www.toxbase.org ) or if this is unavailable at the backup site ( www.toxbasebackup.org ).

    Licensed in pregnancy? - No, contraindicated

    Recommended for use in pregnancy? - No

    Effects on foetus - VATER-association, neural tube defects, holoprosencephaly, other CNS malformations and limb abnormalities have been reported following the use of statins.

    Lactation

    Simvastatin is contraindicated while breastfeeding.

    At the time of writing, there is little published experience concerning the use of statins during breastfeeding. Due to the possible inhibition of cholesterol biosynthesis by statins, there is a theoretical risk posed to the neonate. The products of cholesterol biosynthesis, including cholesterol are essential for neonatal development. Therefore, the use of statins is contraindicated while breastfeeding. The suspension of treatment while breastfeeding is not considered likely to detrimentally affect the long term course of hyperlipidaemia, therefore simvastatin use during breastfeeding is not recommended.

    Neonates, infants born prematurely, those with low birth weight, those with an unstable gastrointestinal function or who have serious illnesses may require special consideration. For any infant, if a drug is prescribed to the nursing mother, it should be at the lowest practical dose and for the shortest time. When drug administration is unavoidable and breastfeeding is to continue, minimisation of exposure of the infant to the drug may sometimes be achieved by timing the maternal doses to just after a feeding episode. Infants exposed to drugs via breast milk should be monitored for unusual signs or symptoms. Interactions between the drug received by the infant from the mother's milk and medication prescribed for the infant should also be considered, for example, when the drug given to the infant may prevent metabolism of the drug received via breast milk.
    Specialist advice is available from the UK Drugs in Lactation Advisory Service at https://www.midlandsmedicines.nhs.uk/content.asp?section=6&subsection=17&pageIdx=1 is contraindicated while breastfeeding.

    Side Effects

    Abdominal pain
    Accelerated erythrocyte sedimentation
    Acute renal failure
    Alopecia
    Altered liver function tests
    Amnesia
    Anaemia
    Anaphylaxis
    Angioedema
    Arthralgia
    Arthritis
    Asthenia
    Confusion
    Constipation
    Cough
    Creatine phosphokinase increased
    Depression
    Dermatomyositis
    Diarrhoea
    Dizziness
    Dyspepsia
    Dyspnoea
    Eosinophilia
    Erectile dysfunction
    Fatigue
    Fever
    Flatulence
    Flushing
    Forgetfulness
    Gastro-intestinal disturbances
    Headache
    Hepatic failure
    Hepatitis
    Hypersensitivity reactions
    Immune mediated necrotizing myopathy
    Impaired memory
    Increase in alkaline phosphatase
    Increase in serum ALT/AST
    Increased fasting blood glucose
    Increased glycated haemoglobin (HbA1c) levels
    Insomnia
    Interstitial lung disease
    Jaundice
    Lupus erythematosus-like syndrome
    Malaise
    Muscle weakness
    Muscular cramps
    Myalgia
    Myopathy
    Myositis
    Nausea
    Nightmares
    Pancreatitis
    Paraesthesia
    Peripheral neuropathy
    Photosensitivity
    Polymyalgia rheumatica
    Precipitation of diabetes
    Pruritus
    Rash
    Rhabdomyolysis
    Sexual dysfunction
    Sleep disturbances
    Tendinopathy
    Tendon rupture
    Thrombocytopenia
    Urticaria
    Vasculitis
    Visual disturbances
    Vomiting
    Weight loss

    Overdosage

    It is strongly recommended that the UK National Poisons Information Service be consulted on cases of suspected or actual overdose where there is doubt over the degree of risk or about appropriate management.

    The following number will direct the caller to the relevant local centre (0844) 892 0111

    Information may be obtained if you have access to ToxBase the primary clinical toxicology database of the National Poisons Information Service. This is available via password on the internet ( www.toxbase.org ) or if this is unavailable at the backup site ( www.toxbasebackup.org ).

    Further Information

    Last Full Review Date: February 2013

    Reference Sources

    Drugs During Pregnancy and Lactation: Treatment Options and Risk Assessment, 2nd edition (2007) ed. Schaefer, C., Peters, P. and Miller, R. Elsevier, London.

    Drugs in Pregnancy and Lactation: A Reference Guide to Fetal and Neonatal Risk, 9th edition (2011) ed. Briggs, G., Freeman, R. and Yaffe, S. Lippincott Williams & Wilkins, Philadelphia.

    Martindale: The Complete Drug Reference, 37th edition (2011) ed. Sweetman, S. Pharmaceutical Press, London.

    Medications and Mothers' Milk, 14th Edition (2010) Hale, T. Hale Publishing, Amarillo, Texas.

    Summary of Product Characteristics: Simvador 10mg. Discovery Pharmaceuticals Ltd. Revised April 2015.
    Summary of Product Characteristics: Simvador 20mg. Discovery Pharmaceuticals Ltd. Revised April 2015.
    Summary of Product Characteristics: Simvador 40mg. Discovery Pharmaceuticals Ltd. Revised April 2015.
    Summary of Product Characteristics: Simvador 80mg. Discovery Pharmaceuticals Ltd. Revised April 2015.

    Summary of Product Characteristics: Simvastatin 10mg film-coated tablets. Accord healthcare Ltd. Revised December 2011.
    Summary of Product Characteristics: Simvastatin 20mg film-coated tablets. Accord healthcare Ltd. Revised December 2011.
    Summary of Product Characteristics: Simvastatin 40mg film-coated tablets. Accord healthcare Ltd. Revised December 2011.
    Summary of Product Characteristics: Simvastatin 80mg film-coated tablets. Accord healthcare Ltd. Revised December 2011.

    Summary of Product Characteristics: Simvastatin 10mg tablets. Actavis UK Ltd. Revised June 2010.
    Summary of Product Characteristics: Simvastatin 20mg tablets. Actavis UK Ltd. Revised June 2010.
    Summary of Product Characteristics: Simvastatin 40mg tablets. Actavis UK Ltd. Revised June 2010.
    Summary of Product Characteristics: Simvastatin 80mg tablets. Actavis UK Ltd. Revised September 2012.

    Summary of Product Characteristics: Simvastatin 10mg tablets. Aurobindo Pharma - Milpharm Ltd. Revised October 2010.
    Summary of Product Characteristics: Simvastatin 20mg tablets. Aurobindo Pharma - Milpharm Ltd. Revised October 2010.
    Summary of Product Characteristics: Simvastatin 40mg tablets. Aurobindo Pharma - Milpharm Ltd. Revised October 2010.
    Summary of Product Characteristics: Simvastatin 80mg tablets. Aurobindo Pharma - Milpharm Ltd. Revised July 2010.

    Summary of Product Characteristics: Simvastatin 40mg tablets. Kent pharmaceuticals Ltd. Revised January 2013.

    Summary of Product Characteristics: Simvastatin 20mg/5ml Oral suspension. Rosemont Pharmaceuticals Ltd. Revised May 2017.
    Summary of Product Characteristics: Simvastatin 40mg/5ml Oral suspension. Rosemont Pharmaceuticals Ltd. Revised May 2017.

    Summary of Product Characteristics: Simvastatin 10mg tablets. Sandoz Ltd. Revised July 2012.
    Summary of Product Characteristics: Simvastatin 20mg tablets. Sandoz Ltd. Revised July 2012.
    Summary of Product Characteristics: Simvastatin 40mg tablets. Sandoz Ltd. Revised July 2012.

    Summary of Product Characteristics: Simvastatin 10mg film-coated tablets. Zentiva. Revised July 2012.
    Summary of Product Characteristics: Simvastatin 20mg film-coated tablets. Zentiva. Revised July 2012.
    Summary of Product Characteristics: Simvastatin 40mg film-coated tablets. Zentiva. Revised July 2012.

    Summary of Product Characteristics: Zocor 10mg, 20mg, 40mg and 80mg film-coated tablets. Merck Sharp & Dohme Ltd. Revised May 2018.

    The Renal Drug Handbook. 3rd edition. (2009) ed. Ashley, C and Currie, Radcliffe Publishing Ltd, Abingdon.

    Drug Safety Update. MHRA Volume 1 issue 7 February 2008.
    Available at https://www.mhra.gov.uk/Publications/Safetyguidance/DrugSafetyUpdate/CON2033917
    Last accessed: February 14, 2013

    Drug Safety Update. MHRA Volume 3, issue 10 May 2010.
    Available at https://www.mhra.gov.uk/Publications/Safetyguidance/DrugSafetyUpdate/CON081863 NB this is for simvastatin only.
    Last accessed: February 14, 2013

    Drug Safety Update. MHRA Volume 5, issue 6 January 2012.
    Available at https://www.mhra.gov.uk/Safetyinformation/DrugSafetyUpdate/CON140667
    Last accessed: February 14, 2013

    Drug Safety Update. MHRA Volume 6, issue 1 August 2012.
    Available at https://www.mhra.gov.uk/Safetyinformation/DrugSafetyUpdate/CON180637
    Last accessed: February 14, 2013

    NAPOS, The Drug Database for Acute Porphyria.
    Available at; https://www.drugs-porphyria.org/
    Simvastatin last revised: October 1, 2004
    Last accessed: February 14, 2013

    NICE Evidence Services Available at: www.nice.org.uk Last accessed: 12 September 2017

    FDA Drug safety Communication: Important safety label changes to cholesterol lowering statin drugs.
    Available at https://www.fda.gov/Drugs/DrugSafety/ucm293101.htm
    Last accessed: February 14, 2013

    National Institute for Health and Clinical Excellence, NICE 71, Identification and management of familial hypercholesterolaemia, issued August 2008.
    Available at: https://www.nice.org.uk/nicemedia/pdf/CG071NICEGuideline.pdf
    Last accessed: February 14, 2013

    US National Library of Medicine. Toxicology Data Network. Drugs and Lactation Database (LactMed).
    Available at: https://toxnet.nlm.nih.gov/cgi-bin/sis/htmlgen?LACT
    Simvastatin Last revised: April 3, 2012
    Last accessed: February 14, 2013

    Access the full UK drug database with a FREE Medscape UK Account
    It takes just a few minutes, and you’ll get unlimited access to information on over 11,000 UK drugs.
    Register for Free

    Already a member? Log in

    Medscape UK | Univadis prescription drug monographs & interactions are based on FDB Multilex Content

    FDB Logo

    FDB Disclaimer : FDB Multilex is intended for the use of healthcare professionals and is provided on the basis that the healthcare professionals will retain FULL and SOLE responsibility for deciding what treatment to prescribe or dispense for any particular patient or circumstance.