0.01 mg/kg up to 0.5 mg — that is 0.01 mL/kg of 1:1,000, maximum 0.5 mL. Adults and children over 50 kg get 0.5 mL. Pregnancy is no reason to hold back: same dose, and lie her on her left side.

Call Triple Zero (000) immediately. Heart attack is a medical emergency; ongoing interruption to coronary blood flow causes increasing heart muscle damage.

Use 15 compressions to 2 ventilations for infants and children under the paediatric BLS guideline. This is distinct from the general BLS approach taught to lay rescuers.

Consider sepsis when acute illness or deterioration may be infection-related. Use a clinical support tool that assesses vital signs and lactate, and escalate care when indicated.

Plot the concentration against time since ingestion, and match laboratory units to the chart. For a single immediate-release tablet overdose, obtain the level at 4 hours or as soon as possible afterwards.

Depress the lower sternum by more than 5 cm and allow full recoil after every compression. Inadequate depth compromises CPR; avoid leaning on the chest between compressions.

If breathing normally, position them on their side, maintain an open airway and call an ambulance. Keep reassessing breathing. If breathing becomes abnormal or stops, begin CPR.

Do not induce vomiting or wait for symptoms. Call the Poisons Information Centre on 13 11 26. Avoid food and drink until advised, and photograph the product label if possible.

Call 000 for an ambulance. Apply vinegar to the sting and remove tentacles. Box jellyfish in northern tropical waters can cause life-threatening envenomation; hospital assessment is needed.

No. Many are at very low risk of important brain injury. Base imaging and observation on clinical risk factors and reassessment. Non-verbal or non-ambulant children need particular caution.

Face, Arms, Speech and Time. Use a validated stroke screen at first contact, then arrange immediate transport to a hospital capable of assessing and treating acute stroke.

Not until the patient is in a facility equipped to assess and treat envenoming. If envenoming is present, give antivenom before removing the bandage. Do not wash the bite site.

No. Pressure bandaging is recommended for funnel-web bites, but not other spider bites. Do not automatically apply snakebite first aid to every envenomation.

Call an ambulance. Give up to 5 back blows, checking after each; if unsuccessful, give up to 5 chest thrusts. Alternate if needed. ANZCOR does not recommend abdominal thrusts.

Stridor, hoarseness, black sputum, respiratory distress, facial swelling or soot in the mouth are warning signs. Prioritise the trauma assessment and consider early intubation when airway injury is suspected.

No. Children can have septic shock without hypotension. Do not wait for a low blood pressure before recognising deterioration and escalating care.