Numbness and tingling are unusual prickling sensations that can happen in any part of your body. People generally notice these sensations in hands, feet, arms, and legs. Many things can cause numbness and tingling, including sitting with your legs crossed or falling asleep on your arm.
Meth can stay in the system and be detected in urinalysis drug tests 1-4 days after use. But chronic use can extended this detection period. More here on how meth works and the length of time it stays in your system, with a section for your questions about meth at the end.
How Long Does Methadone Stay in Your System? The effects of methadone last longer than those of morphine, and this is reflected in the detection time. In a urine test, the typical detection time is 7-10 days, which is considerably longer than the 2-4 days for morphine. There are even reports of maintenance users showing positive for methadone 10-30 days after their last use. Saliva tests are much easier to pass, with the detection time typically being only 24 hours.