Medicine/painkillers:
When working with patients who have lots of pain Paramedics* are allowed to administer painkillers, this can be done in different ways, through IVs (Intravenous), autoinjectors, pills, and so on. This can only be given when the patient meets certain criteria as all medicines have side effects, this is usually heart rate that goes down or up and blood pressure that can go lower or higher. If you're uncertain whether to give the medicine or not go with the benefit of the doubt and don't give anything. The most used painkillers/medicines will be listed down below (302.2) with an explanation and all the side effects.
Morphine:
Morphine can be administered via autoinjectors or IV. Morphine will suppress the pain but also lower the pulse. Too much morphine can OD a person this is why the doses should always be small and managed properly.
Adenosine:
Adenosine is less known but works the same as morphine except it works slower and is easier to counter if something goes wrong. This can be administered via IV or autoinjector
Epinephrine:
Epinephrine, also known as Epi is administered via IV or autoinjector. This does the opposite of morphine and adenosine, it will raise the pulse and boost the chances of waking someone up who is unconscious.
Naloxone:
Naloxone, also known as Narcan is a small nasal administered tube that counters any overdose of opioids. You can give as many as you want as this doesn't overdose someone, if it doesn't work the first time, don't be scared to do it again.