As for precise numbers, I have seen 5, 7, and 10 years from first use cited as an average (mean) in various sources, but was unable to find that they had cited a reliable source for this. Obviously to create a mean there is variation around that mean and individual data points both higher and lower than that figure. Since many meth
addicts are not as conscious of health factors, I would guess that swiy would fall into one of the longer categories- i.e. somewhat longer expected lifespan than the average/mean. Of course no one can tell swiy for sure. But surely some of the factors causing death include AIDS, infections, etc. from shared or re-used needles, so if one is not fang into that risk category it would likely increase his expected lifespan. He would want to look at the factors which can contribute negatively to health that are relevant to his use- i.e possible chems or contaminants in street drugs
, cardiovascular disease, other organ failures, etc. He should address those factors which he can in the ways he can- i.e. he cannot necessarily erase the cardiovascular risks associated with daily meth use, but he could do what he can in other areas to protect the heart; moderate exercise, healthy diet, reasonable cholesterol intake, etc. which it sounds like swiy also is already doing will help. Something like chemicals, contaminants, etc. are also obviously a risk inherent to IVing street drugs and likely cannot be avoided, but for example, seeking prompt medical attention if one does notice unusual symptoms of infection would likely help. You get the picture.
I hope this response is helpful; obviously no one can say, swiy would have x years life expectancy, but assuming the variation from 5-10 is reasonably accurate, and assuming that swiy is healthier than the "average" meth addict, one could surmise that he would be somewhat above (1-2 (?) standard deviations and such, took statistics but my brain doesn't exactly recall how to calculate this) the mean. I would guess a wide variation, with anywhere from a months to 50+ years. Specifically, if one wanted to increase lifespan and reduce health risks, swiy could look at those areas of risk which would apply equally to all meth users and try to take health precautions in other ways (that is, if one does not plan to quit using meth). Also, I believe these numbers are referring to people who are using continuously (though again they may have been plucked from someone's ass lol, as I am not yet finding the study that shows this was actually researched effectively, so take it with a grain of salt in terms of the actual numbers perhaps) so if swiy is using on and off as one states, this may be longer as it is not continuous use and the body may have a chance to heal itself more between uses.
Since you have posted this in the Recovery and Addiction
forum, can I ask how swiy has felt when he has been off meth? And whether he is considering or wanting to quit again? This can be a great source of support, here on the meth R&A subforum and also even moreso the main R&A forum, when deciding to quit and going through the recovery process..
Best of luck to you!!
eta: Here is a link to a great post that links to studies about the length of time it takes for certain effects on the brain to set in from meth use, and the time it takes for the brain to heal after discontinuing meth use.. might be worth checking out.