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Targeted Synthetic DMARD — Phosphodiesterase-4 (PDE4) Inhibitor Pregnancy: Contraindicated during pregnancy (§4.3). There are limited data on the use of apremilast in pregnant women; effects on pregnancy included embryofoetal loss in mice and monkeys, and reduced foetal weights and delayed ossification in mice at doses higher than the currently recommended highest human dose. Pregnancy should be excluded before treatment is initiated and women of childbearing potential should use an effective method of contraception to prevent pregnancy during treatment. Breast-feeding: apremilast was detected in the milk of lactating mice and it is not known whether apremilast or its metabolites are excreted in human milk; a risk to the breastfed infant cannot be excluded, so apremilast should not be used during breast-feeding.

Apremilast

Brand names: Otezla

Apremilast is an oral phosphodiesterase-4 inhibitor used for psoriatic arthritis, plaque psoriasis, and Behcet's disease oral ulcers.

Auto-extracted from the source labelling — not yet independently clinician-verified. These values were distilled from the UK SPC (or the US label where noted) but have not had a clinician sign-off. Confirm against the current SmPC before prescribing.

Adult dose

Dose: 30 mg twice daily (after the required 5-day initial titration)
Route: Oral - film-coated tablets should be swallowed whole and can be taken with or without food
Frequency: Twice daily, the two doses taken approximately 12 hours apart (morning and evening)
Source: UK SPC (eMC) for Apremilast 10 mg, 20 mg, 30 mg Film-coated Tablets (treatment initiation pack), §4.2 (https://www.medicines.org.uk/emc/product/101884/smpc). The same 30 mg twice daily maintenance dose applies to all three adult indications: psoriatic arthritis, psoriasis and Behcet's disease. INITIAL TITRATION IS REQUIRED (SPC Table 1, adults): Day 1 - 10 mg in the morning; Day 2 - 10 mg AM and 10 mg PM; Day 3 - 10 mg AM and 20 mg PM; Day 4 - 20 mg AM and 20 mg PM; Day 5 - 20 mg AM and 30 mg PM; Day 6 and thereafter - 30 mg AM and 30 mg PM. No re-titration is required after initial titration. MISSED DOSE: take the next dose as soon as possible; if it is close to the time of the next dose, skip the missed dose and take the next dose at the regular time. DURATION / REVIEW: during pivotal trials the greatest improvement was observed within the first 24 weeks of treatment for psoriatic arthritis and psoriasis and within the first 12 weeks for Behcet's disease; if a patient shows no evidence of therapeutic benefit after this period, treatment should be reconsidered, and response should be evaluated on a regular basis. PRESCRIBER: treatment should be initiated by specialists experienced in the diagnosis and treatment of psoriasis, psoriatic arthritis or Behcet's disease. ELDERLY: no dose adjustment required. HEPATIC IMPAIRMENT: no dose adjustment necessary. SEVERE RENAL IMPAIRMENT: see renalAdjustment - note that titration in this group uses only the AM schedule and the PM doses are skipped. UNDERWEIGHT PATIENTS: patients who are underweight (and paediatric patients with a borderline to low body mass index at the start of treatment) should have their body weight monitored regularly; in the event of unexplained and clinically significant weight loss they should be evaluated and discontinuation considered. PAEDIATRIC (body-weight-band dosing, NOT a per-kg dose, so it is not expressed as mg/kg): for paediatric patients 6 years of age and older with moderate to severe plaque psoriasis the recommended dose is 20 mg twice daily for those who weigh from 20 kg to less than 50 kg, and 30 mg twice daily for those who weigh at least 50 kg, following the initial titration in SPC Table 2 (both weight bands: Day 1 10 mg AM; Day 2 10 mg AM and 10 mg PM; Day 3 10 mg AM and 20 mg PM; Day 4 20 mg AM and 20 mg PM; Day 5 onwards 20 mg AM and 20 mg PM for 20 kg to less than 50 kg, or 20 mg AM then 30 mg PM from Day 5 and 30 mg twice daily from Day 6 for 50 kg or more). In paediatric patients 6 years and older with severe renal impairment (creatinine clearance less than 30 mL/min by Cockcroft-Gault) the dose should be reduced to 30 mg once daily for those weighing at least 50 kg and to 20 mg once daily for those weighing 20 kg to less than 50 kg, titrating using only the AM schedule. Safety and efficacy have not been established in children with moderate to severe plaque psoriasis below the age of 6 years or with a body weight less than 20 kg, or in other paediatric indications, and no data are available. Verify any under-18 dosing against a children's formulary. US CROSS-CHECK (openFDA, Otezla/Otezla XR, Amgen, label date 2025-08-22): the same 30 mg twice daily maintenance dose after the same 5-day titration, and additionally an extended-release presentation (OTEZLA XR 75 mg once daily) that is not part of the fetched UK SPC; the US label also approves paediatric psoriatic arthritis from 6 years and at least 20 kg. Do not carry the XR regimen onto this page without a UK source.

Dose adjustments

Renal

No dose adjustment is needed in adult patients with mild or moderate renal impairment. In adults with severe renal impairment (creatinine clearance less than 30 mL per minute estimated by the Cockcroft-Gault equation) the dose should be reduced to 30 mg once daily; for initial dose titration in this group, titrate using only the AM schedule in SPC Table 1 and skip the PM doses.

Dose auto-extracted from UK Summary of Product Characteristics (SPC) via the eMC; US FDA prescribing information (openFDA / DailyMed) — cross-check; US labelling may differ from UK — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.

Contraindications

  • Hypersensitivity to the active substance or to any of the excipients
  • Pregnancy

Side effects

  • Diarrhoea (15.7% in psoriatic arthritis and psoriasis; 41.3% in Behcet's disease) and nausea (13.9%; 19.2% in Behcet's disease) - very common; generally occur within the first 2 weeks of treatment and usually resolve within 4 weeks. Post-marketing reports of severe diarrhoea, nausea and vomiting, sometimes requiring hospitalisation
  • Upper respiratory tract infection (8.4%; 11.5% in Behcet's disease) - very common; bronchitis and nasopharyngitis common
  • Headache (7.9%) and tension headache (7.2%) - very common; migraine common
  • Vomiting, dyspepsia, frequent bowel movements, upper abdominal pain and gastro-oesophageal reflux disease (common); gastrointestinal haemorrhage (uncommon)
  • Psychiatric reactions - insomnia and depression (common); suicidal ideation and behaviour, anxiety and mood altered (uncommon)
  • Decreased appetite, back pain, fatigue and cough (common); weight decrease (uncommon)

Interactions

  • Strong CYP3A4 enzyme inducers (e.g. rifampicin, phenobarbital, carbamazepine, phenytoin and St John's Wort) - reduce systemic exposure of apremilast, which may result in loss of efficacy; concomitant use is not recommended (UK SPC §4.5; US label §7.1 gives the same warning for strong CYP450 inducers such as rifampin)
  • The UK SPC §4.5 text was truncated at the source-fetch limit immediately after the CYP3A4 inducer paragraph ('Co-administration of ...') - further interactions were not retrieved; verify against the full §4.5

Clinical monograph

How it works

It inhibits phosphodiesterase-4, increasing intracellular cyclic AMP and thereby modulating the production of pro-inflammatory and anti-inflammatory mediators.

Prescribing in practice

  • Depression and suicidal ideation have been reported, so assess mental health and counsel patients and carers to report mood changes.
  • Diarrhoea, nausea, and weight loss are common, particularly early in treatment, and the dose is up-titrated to improve tolerability.
  • Dose reduction is needed in severe renal impairment.

Monitoring

Monitor body weight, gastrointestinal tolerability, and mental health (including mood and suicidal ideation).

Counselling the patient

  • Report any new or worsening low mood, anxiety, or thoughts of self-harm.
  • Nausea and diarrhoea are common at first and usually improve; report troublesome or persistent weight loss.
  • Take as directed; the dose is increased gradually when starting.

Evidence & guidelines

Use in psoriatic arthritis and psoriasis is supported by the PALACE and ESTEEM trial programmes and relevant NICE guidance; consult the SPC.

Reference: NICE TA433; PALACE 1–4 Trials; MHRA Drug Safety Update (depression/suicidality 2019); Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).

Related

Curated clinical cross-links plus same-class fallbacks.