The effects you are experiencing will subside. Just let it happen. Rest. Drink spring water. Get fresh air. Meth users take meth using different routes of administration. In fact, the route of administration can change onset of action, as well as duration of action. But whether it is smoked, snorted, injected, or ingested, meth is usually introduced to the body in significantly large doses. Smoking is method of ingestion used by people who chronically take meth. Meth even has the potential to be absorbed through intact skin in body areas with high surface concentration. However, the fastest way to get meth into your bloodstream and brain through injection, almost instantly causing effects. Meth time in the body There are no significant interactions between meth and verapamil. Some of your palpitations and and chest pains may be from high anxiety (panic). Take long deep breaths and tell yourself that this is going to pass. Relax. Meth is metabolized in the body to three active metabolites: amphetamine, p-OH-amphetamine and nor-ephedrine. All of these metabolites remain in body fluids for some period of time, making meth detectable on drug tests. In urine-based drug tests. Following IV injection, the elimination half-life of meth is over 12 hours, which is longer compared to oral administration during which methamphetamine reaches is eliminated by the body in about 10 hours. General effects of meth are often compared to those of cocaine with longer duration. Meth effects last longer, lasting for up to 12 hours after administration. You will be fine. If you are having a real medical emergency you should, of course go to the ER, but it sounds more like panic.