So my friend has been using for a while,shes not addicted,which is strange because the person who taught her how to use meth warned her a bunch about how addicting it is,and they are addicted themselves.But she can go on without,no cravings,she could live without it no problem. But she doesnt know much about how much is to much. Normally she smokes about 2 bowls in one day possibly more. Is that bad? The stuff she smokes is mostly clear,decent size crystals. She will share a bowl with her significant other,they started at one pm and smoked up till 11 pm, it was two decent sized bowls maybe? Shes not to sure,but shes wondering if she could smoke more or if maybe shes had to much. She feels fine,heart rate normal,etc so I have a few questions,how much is to much for infrequent users who don't seem to be effected by it to much,and could someone overdose without a rise in heart rate? I am pretty uneducated about this sort of thing,so could someone help me out? Possibly message me about bowl sizes or answer any pathetically stupid questions I have? If anyone answers please be patient with me,and understand that I know almost nothing about this drug and I am just trying to educate myself so that my friend wont do something she may regret.