Zgodnie z przeszukaniem najbardziej wyczerpującego forum dyskusyjnego o metamfetaminie w historii (archiwum Hive) "smerf dope" jest wynikiem blokerów histaminy; Loperamid, Chorphenimin i loratadyna nie są usuwane z tabletek psuedoefedryny (być może nawet całe pigułki wstrząsane i pieczone), a użycie żelaza lub miedzi może powodować zielonkawe zabarwienie. 
- By DirkDiggler
Jak mogę wyczyścić z tego tabletki?
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- By mycelium
Cant a substance called norite (spelling)?
On the corner of Haight and Masonic Street at 2am, one of the chemists of the family told me how to clean amber or lavender crystal into white using norite to absorb color
I don't know why he told me, he was rambling, but I never forgot it, or him, and saw him at RFK stadium the next year with hair cut and no beard, a hat and sunglasses, all incognito,
On the corner of Haight and Masonic Street at 2am, one of the chemists of the family told me how to clean amber or lavender crystal into white using norite to absorb color
I don't know why he told me, he was rambling, but I never forgot it, or him, and saw him at RFK stadium the next year with hair cut and no beard, a hat and sunglasses, all incognito,
