What to expect from allergy medication for insect bites and stings

Antihistamines can lessen histamine-related itching, hives and local swelling. A cold compress and keeping the affected area raised may also help discomfort. A large local reaction can remain swollen for a while even when treatment is working. Allergy medicine does not remove venom, prevent infection, or reliably treat airway swelling, a sudden drop in blood pressure, or breathing difficulty.

Move away from the insect and, if a stinger is visible, ask a clinician or pharmacist how it should be removed. Use medicine only according to its label or prescription; avoid taking extra antihistamines because the itch is strong. Do not scratch the area, and watch whether swelling spreads beyond the original site. If you have been prescribed an emergency adrenaline device for a previous severe reaction, keep it available and follow your personalised action plan.

Call emergency services immediately for trouble breathing, throat or tongue swelling, widespread hives with dizziness, faintness, repeated vomiting, or sudden weakness after a sting or bite. Do not wait for an antihistamine to work. Seek medical advice for increasing warmth, pain, pus, fever, or swelling that continues to expand, as these can suggest infection or a more extensive reaction.

Ask whether your reaction was local or systemic, what to carry for future stings, and whether you need an individual emergency plan or allergy referral.