Limited information indicates that maternal doses of haloperidol up to 10 mg daily produce low levels in milk and usually do not affect the breastfed infant. Very limited long-term follow-up data indicate no adverse developmental effects when haloperidol is used alone. However, use with other antipsychotic drugs occasionally might negatively affect the infant. One expert guideline recommends against using haloperidol during breastfeeding,[1] but a safety scoring system finds haloperidol possible to use cautiously during breastfeeding.[2] Monitor the infant for drowsiness and developmental milestones, especially if other antipsychotics are used concurrently.