First generation alkylamine-antihistamine drug, with sedative effect. Active isomer of Chlorpheniramine. Likely inhibition of lactation within the first weeks of post-natal period because of an anti-prolactin effect. Short-term and low dose treatment is compatible with breastfeeding. Be aware of somnolence in the child. For long-term treatments an alternative drug should be preferred. Compounds in association with expectorants, corticoids and cough relief medicines are commercially available. Avoid drug associations especially while breastfeeding. Follow-up on sedation and feeding ability of the infant. Bed-sharing is not recommended for mothers who are taking this medication.