"ya ba" tablets typically are consumed orally. users also place the "ya ba" tablet on aluminum foil and heat it from below. as the tablet melts, vapors rise and are inhaled ("chasing the dragon"). the drug also may be administered by crushing the tablets into powder, which is then snorted or mixed with a solvent and injected. when swallowed in pill form the duration of the drug's effect is between 8–16 hours, as compared to 1–3 hours when smoked, while the intensity is considerably reduced. the peak of the drug's effect is followed by a comedown period lasting 6–10 hours, during which the user may have difficulty sleeping or eating. many users report that it takes them up to 24 hours after consumption to be able to fall asleep.