Use of PED WTSHTF and Afterwards

[TOF]

I think it's an entirely personal decision and there is no right or wrong answer.
Personally I wouldn't but that is purely because of my physical state and age, I don't think my body would cope well with any stimulant in quantity.
There is also the possibilty, not necessarily of addiction, but of becoming reliant mentally on these PEDs. You might come to believe you cannot achieve X without the aid of of the drug of choice.
Leading on from that, long term use of anything, especially in stressful situations or when your body changes through lack of nutrition will eventually have a detrimental effect regardless of how safe it is to use normally.
If you are using PEDs to effect an enhanced physical state, you will have no idea where your genuine physical boundaries are and what you could actually do given those circumstances without enhancement.
Finally there will come a time when they are no longer available.
But that's just my opinion.

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Re: point 3 due to the circumstances you might find yourself in, your mental state may not be 'normal' ie; not what it is at the moment.