What is the least expensive opiate?

Does dextroamphetamine and methamphetamine come up the same on a urinalysis? Does swimming clear your system of THC? Does pregabalin work right away or does it take a while? Can the birth control pill Yaz cause odd periods? What kind of sunglasses was Kevin Costner wearing in the opening scene of The Postman? Is it all right to only take adderall on weekdays? Can you crush xifaxan tablets before taking? Can Tylenol 3 be called into a pharmacy? Does mdma make you impotent? What is the difference of a hormone IUD and a copper IUD? Is smoking mariguana bad for you? What can a person use to keep a urine sample from being diluted? Ive heard that a Mirena IUD your periods come back to normal after a month but its been 5 months and im really irregular what can it be? Can you mix cephalexin with cefdinir? What are two common hallucinogens? How many years can you get for selling X to an under cover cop? Which way does an isotonic solution flow? Do you need to use a second form of birth control when you have your period but the NuvaRing is in at this time? Why is 2-butanone used with acetaminophen? If i am farsighted what lenses do i need?