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Beclometasone (ATC A07EA07): Toxicological-Lactological Monograph
ATC class and general pharmacology
A07EA07 designates beclometasone, classified within the alimentary tract and metabolism group as an intestinal anti-inflammatory corticosteroid acting locally. WHO ATC/DDD Indexatcddd.fhi
For intestinal use, beclometasone is commonly administered as beclometasone dipropionate in gastro-resistant, prolonged-release oral formulations. A 5 mg formulation is indicated as add-on therapy for active mild-to-moderate ulcerative colitis in patients with insufficient response to 5-aminosalicylate therapy. Clipper Summary of Product Characteristicsmedicines.org
Beclometasone dipropionate is a glucocorticoid prodrug, with beclometasone-17-monopropionate as its pharmacologically active metabolite. Its therapeutic activity is mediated by glucocorticoid-receptor-dependent suppression of intestinal inflammatory pathways, including reduced inflammatory-cell recruitment and cytokine activity. Clipper Summary of Product Characteristicsmedicines.org
The prolonged-release intestinal formulation aims to maximize local colonic exposure while reducing systemic corticosteroid activity. After oral administration of 5 mg, systemic availability of the active metabolite is approximately 20% relative to intravenous exposure. Clipper Summary of Product Characteristicsmedicines.org
Toxicological profile
Beclometasone can cause systemic glucocorticoid toxicity despite its predominantly local intestinal action. The principal toxicological concern is suppression of the hypothalamic-pituitary-adrenal axis, which can reduce the physiological stress response during severe infection, trauma, or surgery. Clipper Summary of Product Characteristicsmedicines.org
In clinical studies of oral beclometasone dipropionate 5 mg, reduced plasma cortisol concentrations after four weeks occurred in up to 25% of patients, although clinical manifestations of adrenal insufficiency were not reported during the limited treatment period. HPA-axis recovery is expected after withdrawal, but prolonged treatment requires clinical vigilance. Clipper Summary of Product Characteristicsmedicines.org
Uncommon adverse effects reported with the 5 mg intestinal formulation include anxiety, headache, somnolence, nausea, constipation, abdominal pain, muscle cramps, menorrhagia, influenza-like illness, and pyrexia. Clipper Summary of Product Characteristicsmedicines.org
Higher doses or prolonged systemic exposure may produce class-related corticosteroid effects, including adrenal suppression, cushingoid features, increased infection susceptibility, lymphocyte changes, obesity, osteoporosis, cataract, glaucoma, benign intracranial hypertension, psychiatric reactions, and visual disturbance. Clipper Summary of Product Characteristicsmedicines.org
Potentially serious psychiatric effects, including depression, mood instability, anxiety, psychosis, and suicidal ideation, may occur with systemic corticosteroid exposure and can emerge during treatment or dose reduction. Clipper Summary of Product Characteristicsmedicines.org
Lactation pharmacology and infant exposure
Direct studies measuring beclometasone or beclometasone-17-monopropionate concentrations in human milk after oral intestinal treatment have not been published. Infant serum concentrations and formal relative infant dose estimates are likewise unavailable. LactMed: Beclomethasonencbi.nlm.nih
The expected infant exposure is nevertheless low because oral beclometasone has limited maternal systemic availability and low oral bioavailability. These properties reduce both transfer into milk and systemic absorption of any drug ingested by the infant. Specialist Pharmacy Servicesps.nhs
LactMed notes that systemic absorption of inhaled corticosteroids is low and that expert opinion considers inhaled, nasal, and oral corticosteroids acceptable during breastfeeding. However, this conclusion for beclometasone is based mainly on pharmacological characteristics and class experience rather than direct milk-transfer data for oral intestinal formulations. LactMed: Beclomethasonencbi.nlm.nih
The manufacturer’s product information takes a more conservative position, stating that excretion of beclometasone dipropionate into human milk is unknown and that use during lactation should be reserved for cases in which it is strictly indicated after an individual benefit-risk assessment. Clipper Summary of Product Characteristicsmedicines.org
Lactological safety assessment and clinical recommendations
Oral beclometasone is considered a preferred corticosteroid option during breastfeeding by the UK Specialist Pharmacy Service because of its low systemic absorption and low oral bioavailability. Specialist Pharmacy Servicesps.nhs
For a healthy, full-term infant, treatment with the lowest effective maternal dose for the shortest effective duration is generally compatible with continued breastfeeding. Routine interruption of breastfeeding or milk discarding is not normally required. Specialist Pharmacy Servicesps.nhs
During prolonged therapy, high-dose exposure, or circumstances that increase maternal systemic exposure, the infant should be observed for adequate feeding, normal growth, satisfactory weight gain, and possible features of adrenal suppression. Specialist Pharmacy Servicesps.nhs
A more cautious individualized assessment is appropriate for preterm, unwell, or medically complex infants, as well as when the infant has concurrent exposure to other medicines with potential adrenal effects. Specialist Pharmacy Servicesps.nhs
Maternal disease control remains important during lactation, and active ulcerative colitis should not be undertreated solely because of breastfeeding. Clinical decisions should balance the limited direct lactation evidence against the low anticipated infant exposure and the consequences of uncontrolled maternal intestinal inflammation. Specialist Pharmacy Servicesps.nhs



