The HSE have clarified the point of giving Asprin to someone who is having a heart attack. This advice is directly for first aiders in the workplace but good advise in all sectors. They state:
Anecdotal information has come to our attention that training on the administration of aspirin on FAW courses appears to be inconsistent. The view of HSE is that the administration of medication by a first aider is not part of a FAW or EFAW training course, but you can assist an individual in taking it. However, the one exception is when training students on first aid for heart attacks, when this subject must be covered. Therefore, for heart attack management, the student must be able to assist a casualty in taking 300 mg of aspirin and to advise them to chew it, not swallow.
If you need any further clarification on this please email us.