Swimmingdancer
Bluelight Crew
If you are lucky enough to not just pass out right away, some of what you may feel would be this:
-Tingling sensation in face and fingers after injection.
-Way too strong of a rush, actually painful pins and needles
-Blurred vision
-Slowed breathing
If you feel any of those especially any together (the blurred vision in particular) you might have time to call an ambulance and save your own life.
I don't know if those should be taken as signs of an overdose. Blurred vision is extremely common with opioids, and the tingling/pins and needles I've had plenty of times without being anywhere close to an OD, it tends to happen more with certain dope that is poorly refined like tar heroin, that type of powder dope that it actually tar heroin mixed with lactose, or dope that has morphine in it. Slowed breathing - it depends how slow it is, opioids do slow your breathing even when not near fatal doses. When I have actually seriously OD'd I didn't have any of those symptoms aside from the slowed breathing - I just felt like I had to sit down and take a nap and then my breathing stopped. My friend said my lips and nails were blue and she could wake me so she called an ambulance thankfully. Moral of the story is never inject heroin alone, if you have a serious OD it's very unlikely you will be able to do anything to save yourself.