craving duration

[duhduhduhda]

i have been told numerous times (in my various detox and rehab visits) that a craving last 15 to 20 minutes

IMO this is FAR from true
my cravings come frequently and usually last for much longer like a few hours

i was just wondering if this was true for anybody else as i'm really struggling with it i'm on 70 mgs of methadone yet i STILL get these debilitating cravings it keeps me from being able to concentrate on anything at all

all i can do is try to distract myself but i always know in the back of my head that i'm just distracting myself and it's still there thus it never really works

my iguana recently relapsed with some dilaudid on top of the methadone and it did nothing for him due to the methadone yet the physical act of sticking a needle into his little iguana veins ceased the cravings
making me think thats its maybe an extremely intense needle fixation and that makes no sense to me i can't imagine why he would feel this way about something like that and it's beginning to drive me crazy as these cravings come about every 2 days
and i don't know what to do about it

i was just wondering if anyone else has ever felt this way before
or maybe some of the more medically competent board members could offer an explanation as to why i would feel this way about something so stupid

the methadone has helped me immensly in making a better life for myself but these cravings make me feel like joining my pet iguana in his heroin habit

i just don't know what to do and it's making me crazy

thanks