Lactation and anaphylaxis: what to know

Anaphylaxis can begin suddenly after food, medicine, an insect sting, or another trigger. Warning signs include swelling of the lips, mouth, or throat; wheezing or trouble breathing; widespread hives; repeated vomiting; dizziness; collapse; or a sudden feeling that something is seriously wrong. Lactation does not make anaphylaxis less urgent. The reaction is different from ordinary breastfeeding discomfort, blocked ducts, or a food intolerance. If a baby may also have been exposed to a suspected food or medicine, tell the emergency team.

Use your prescribed adrenaline auto-injector immediately if anaphylaxis is suspected, following its instructions, and call emergency services. Lie down with legs raised if possible; sit up only if breathing is difficult, and avoid standing or walking. If symptoms do not improve, follow your emergency plan about another dose while waiting for help. Do not rely on antihistamines or an inhaler as the sole treatment. Tell responders that you are breastfeeding, what triggered the reaction if known, and which medicines you used. Emergency clinicians can advise about feeding and expressing milk after stabilisation.

Any breathing difficulty, throat tightness, faintness, collapse, or rapidly spreading reaction after a possible allergen requires emergency care. Symptoms can return after initial improvement, so remain under medical observation for the period advised by the emergency team. Afterward, arrange allergy follow-up to identify triggers, renew an emergency plan, and discuss allergy testing. Ask how to store and carry auto-injectors and how a support person can use them. Do not re-test a suspected food or medicine at home.

What was the likely trigger, and should I avoid related products? Is my adrenaline device suitable and in date? When can I safely breastfeed or express milk after treatment? Do I need allergy testing or a written emergency plan for home and travel?