Final answer:
A first aid kit typically includes adhesive bandages, painkillers like acetaminophen and NSAIDs, antibiotic ointment, and an ice pack. For severe allergic reactions, epinephrine is used to counteract anaphylactic shock.
Step-by-step explanation:
Items often included in a first aid kit are adhesive bandages, which are used to cover and protect small cuts and scrapes, painkillers, such as acetaminophen and non-steroidal anti-inflammatory drugs (NSAIDs) for relieving minor aches and pains, antibiotic ointment to prevent infection in minor wounds, and an ice pack which can be used to reduce swelling and provide temporary pain relief for injuries.
The drug used to counteract the effects of anaphylactic shock is epinephrine, which is a critical medication in emergency situations. Antihistamines can also be used to relieve symptoms of allergic reactions but are not as immediately lifesaving as epinephrine for anaphylactic shock.