Treatment algorithm

Please note that formulations/routes and doses may differ between drug names and brands, drug formularies, or locations. Treatment recommendations are specific to patient groups: see disclaimer

ACUTE

gestational pruritus (serum bile acid concentrations <10 micromol/L)

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emollient

Current management of pruritus is limited to topical creams (e.g., aqueous cream with menthol) and emollients.

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Consider – 

antihistamine

Additional treatment recommended for SOME patients in selected patient group

Maternal itch is not thought to be secondary to histamine, so the use of a sedating antihistamine (e.g., chlorphenamine) is purely aimed to improve sleep.[14] However, the safety of antihistamine use in pregnancy is well established. 

Primary options

chlorphenamine: 4 mg orally every 4-6 hours when required, maximum 24 mg/day

mild intrahepatic cholestasis of pregnancy (serum bile acid concentrations ≥10 [or non-fasting, ≥19] and <40 micromol/L)

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1st line – 

emollient

Current management of pruritus is limited to topical creams (e.g., aqueous cream with menthol) and emollients.

Back
Consider – 

antihistamine

Additional treatment recommended for SOME patients in selected patient group

Maternal itch is not thought to be secondary to histamine, so the use of a sedating antihistamine (e.g., chlorphenamine) is purely aimed to improve sleep.[14] However, the safety of antihistamine use in pregnancy is well established. 

Primary options

chlorphenamine: 4 mg orally every 4-6 hours when required, maximum 24 mg/day

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Consider – 

ursodeoxycholic acid

Additional treatment recommended for SOME patients in selected patient group

Ursodeoxycholic acid reduces the severity of pruritus (although to a small degree and inconsistently), alters the composition of the bile acid pool (enriching it with hydrophilic ursodeoxycholic acid and reducing hydrophobic bile acid concentrations), and reduces alanine aminotransferase concentrations.[90][91] [ Cochrane Clinical Answers logo ] ​​​ In a large placebo-controlled trial, which included more than 600 women, ursodeoxycholic acid did not reduce the frequency of a composite of adverse pregnancy outcomes that included preterm birth, stillbirth, and neonatal unit admission, although it did reduce meconium-staining of the amniotic fluid.[92]​ Reassuringly, however, ursodeoxycholic acid use was not associated with adverse side effects compared with placebo.

A subsequent meta-analysis that included individual participant data from 6974 women in 34 studies showed that UDCA protects against spontaneous preterm birth in singleton ICP pregnancy.[93]

Although the Royal College of Obstetricians and Gynaecologists recommends against routine use of ursodeoxycholic acid due to lack of evidence for maternal or fetal benefit, the more recent European and joint Australian and New Zealand guidelines cite the new data and suggest ursodeoxycholic acid may be considered for women with mild ICP (bile acids <40 micromol/L).[14][79][94]

Decisions about treatment should be individualised.

Primary options

ursodeoxycholic acid: consult specialist for guidance on dose

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Consider – 

vitamin K

Additional treatment recommended for SOME patients in selected patient group

Although there is no overall increased risk of bleeding (coagulopathy or postnatal haemorrhage) for women with ICP, supplementary vitamin K (as phytomenadione) is recommended for women with steatorrhoea or taking bile acid-binding resins (such as colestyramine) because of the risk of vitamin K deficiency with fat malabsorption.[82][104]

Primary options

phytomenadione: consult specialist for guidance on dose

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Consider – 

induction of labour or elective caesarean section

Additional treatment recommended for SOME patients in selected patient group

For women with peak bile acid concentrations of <100 micromol/L, there is no significantly increased risk of stillbirth compared with the background population, and thus early delivery (before 40 gestational weeks) to prevent stillbirth is not clearly indicated.[2]

It is important to continue to measure maternal serum bile acid concentrations because they may increase with advancing gestation. The balance of risk between early delivery and stillbirth should be discussed with women with ICP. Delivery may be expedited on an individual basis, if women have additional pathology or intolerable symptoms. The relative paucity of outcome data from pregnancies extending past 40 gestational weeks means that delivery is typically offered from 38 to 39 gestational weeks for women with moderate or even mild disease.[14][76]

moderate intrahepatic cholestasis of pregnancy (serum bile acid concentrations ≥40 and <100 micromol/L)

Back
1st line – 

emollient

Current management of pruritus is limited to topical creams (e.g., aqueous cream with menthol) and emollients.

Back
Consider – 

antihistamine

Additional treatment recommended for SOME patients in selected patient group

Maternal itch is not thought to be secondary to histamine, so the use of a sedating antihistamine (e.g., chlorphenamine) is purely aimed to improve sleep.[14] However, the safety of antihistamine use in pregnancy is well established. 

Primary options

chlorphenamine: 4 mg orally every 4-6 hours when required, maximum 24 mg/day

Back
Consider – 

ursodeoxycholic acid

Additional treatment recommended for SOME patients in selected patient group

Ursodeoxycholic acid reduces the severity of pruritus (although to a small degree and inconsistently), alters the composition of the bile acid pool (enriching it with hydrophilic ursodeoxycholic acid and reducing hydrophobic bile acid concentrations), and reduces alanine aminotransferase concentrations.[90][91] [ Cochrane Clinical Answers logo ] ​​ In a large placebo-controlled trial, which included more than 600 women, ursodeoxycholic acid did not reduce the frequency of a composite of adverse pregnancy outcomes that included preterm birth, stillbirth, and neonatal unit admission, although it did reduce meconium-staining of the amniotic fluid.[92] Reassuringly, however, ursodeoxycholic acid use was not associated with adverse side effects compared with placebo.

A subsequent individual patient data meta-analysis found that treatment with ursodeoxycholic acid was associated with a reduction in preterm birth (most clearly, spontaneous preterm birth) in singleton pregnancies in women whose serum bile acid concentrations at diagnosis or randomisation were ≥40 micromol/L.[93] Thus, ursodeoxycholic acid is recommended, in particular, for women with ICP before 37 gestational weeks who have bile acid concentrations ≥40 micromol/L.

Decisions about treatment should be individualised.

Primary options

ursodeoxycholic acid: consult specialist for guidance on dose

Back
Consider – 

vitamin K

Additional treatment recommended for SOME patients in selected patient group

Although there is no overall increased risk of bleeding (coagulopathy or postnatal haemorrhage) for women with ICP, supplementary vitamin K (as phytomenadione) is recommended for women with steatorrhoea or taking bile acid-binding resins (such as colestyramine) because of the risk of vitamin K deficiency with fat malabsorption.[82][104]

Primary options

phytomenadione: consult specialist for guidance on dose

Back
Consider – 

induction of labour or elective caesarean section

Additional treatment recommended for SOME patients in selected patient group

For women with ICP who have peak bile acid concentrations of <100 micromol/L, there is no significantly increased risk of stillbirth compared with the background population, and thus early delivery (before 40 gestational weeks) to prevent stillbirth is not clearly indicated.[2]

It is important to continue to measure maternal serum bile acid concentrations because they may increase with advancing gestation. The balance of risk between early delivery and stillbirth should be discussed with women with ICP. Delivery may be expedited on an individual basis, if women have additional pathology or intolerable symptoms. The relative paucity of outcome data from pregnancies extending past 40 gestational weeks means that delivery is typically offered from 38 to 39 gestational weeks for women with moderate or even mild disease.[14][76]

severe intrahepatic cholestasis of pregnancy (serum bile acid concentrations ≥100 micromol/L)

Back
1st line – 

induction of labour or elective caesarean section

The stillbirth rate is significantly elevated for women with ICP who have peak bile acid concentrations of ≥100 micromol/L compared with the background population, and the stillbirth rate increases in the 35th gestational week particularly.[2] Delivery by induction of labour or elective caesarean section (based on obstetric indications) should be offered from the 35th gestational week.[76]

Back
Consider – 

ursodeoxycholic acid

Additional treatment recommended for SOME patients in selected patient group

Ursodeoxycholic acid reduces the severity of pruritus (although to a small degree and inconsistently), alters the composition of the bile acid pool (enriching it with hydrophilic ursodeoxycholic acid and reducing hydrophobic bile acid concentrations), and reduces alanine aminotransferase concentrations.[90][91] [ Cochrane Clinical Answers logo ] ​​​ In a large placebo-controlled trial, which included more than 600 women, ursodeoxycholic acid did not reduce the frequency of a composite of adverse pregnancy outcomes that included preterm birth, stillbirth, and neonatal unit admission, although it did reduce meconium-staining of the amniotic fluid.[92] Reassuringly, however, ursodeoxycholic acid use was not associated with adverse side effects compared with placebo. A subsequent individual patient data meta-analysis found that treatment with ursodeoxycholic acid was associated with a reduction in preterm birth (most clearly, spontaneous preterm birth) in singleton pregnancies in women whose serum bile acid concentrations at diagnosis or randomisation were ≥40 micromol/L.[93] Thus, ursodeoxycholic acid is recommended, in particular, for women with ICP before 37 gestational weeks who have bile acid concentrations ≥40 micromol/L. Decisions about treatment should be individualised.

Primary options

ursodeoxycholic acid: consult specialist for guidance on dose

Back
Consider – 

vitamin K

Additional treatment recommended for SOME patients in selected patient group

Although there is no overall increased risk of bleeding (coagulopathy or postnatal haemorrhage) for women with ICP, supplementary vitamin K (as phytomenadione) is recommended for women with steatorrhoea or taking bile acid-binding resins (such as colestyramine) because of the risk of vitamin K deficiency with fat malabsorption.[82][104]

Primary options

phytomenadione: consult specialist for guidance on dose

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Please note that formulations/routes and doses may differ between drug names and brands, drug formularies, or locations. Treatment recommendations are specific to patient groups. See disclaimer

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