It will certainly last until either you stop meth or die. Assuming one stops meth. There are several possibilities depending on why one has tingling in the hands: hyperventilation (can be minutes to weeks if the hyperventialation isn t directly from the drug but due to panic attacks caused by the drug. The hyperventilation continues until no more panic attacks. May require short psychological counseling). electrolyte abnormalities from not eating. Low potassium, calcium and/or magnesium can make nerves function abnormally. A balanced diet with increased vegetables will correct this often in ONE day but by a week. Stroke or brain damage would NOT be at the tips of the fingers but would be larger areas. This would take months to improve and might not improve totally. Dehydration from diarrhea. Might require (minor) prescription drugs for a very brief time. Pedialyte, pepto bismal, over the counter diarrhea medicines and a balanced diet (if it stays in) can correct that in days to a week.