Clear the air passages
The most important step to treat a morphine overdose case is to ensure that the victim is able to breathe. Make sure that you clear his/her air passage ways and clear vomit from his mouth. The recommended way of doing that is to roll over the victim to the side and pat on his back consecutively.
Ensure that the tongue does not roll into the mouth. You can use your hand to get it out and or to clean the vomit for that matter.
Get morphine out of the system
Morphine gradually gets absorbed and you should be quick to get it out of the system. Never try to induce a vomit until you know the treatment and have requisite resources available. To induce the vomit, you can give the victim a saturated salt solution, or put your finger inside his mouth.
Activated charcoal tablets and commercial laxatives can also be a good way to get morphine excreted out of the body. The best method will be to rush the victim to the hospital and get his stomach washed.
Naloxone is the antidote to morphine. After taking the initial precautionary step and placing the victim on the respirator, Naloxone should be administered intravenously along with glucose and other fluids. It can also be sprayed through nose.