i dont see how you can say your tolerance hasnt changed then say some days a i smoke a half ounce maybe you just started out with an incredibly high one but smoking on like one bowl my first few times had me high for hours. a half a cant imagine. now i can now that whenever i get high on really good weed i am back to normal in under an hour even if i havent smoked in awhile, but my eyes stay red for about 4 hours after