The import and sale of opium poppy seeds is legal in Canada, but possession of other parts of the plant may be prosecuted. Canadian authorities have noted the presence of dode or doda in the South Asian community, a traditional form of poppy tea. Crackdowns on this traditional preparation in the late 2000s led to a number of arrests in Canada. Poppy tea contains two groups of alkaloids: phenanthrenes (including morphine and codeine) and benzylisoquinolines (including papaverine). Of these, morphine is the most prevalent comprising 8%-14% of the total. Its effects derive from the fact that it binds to and activates mu opioid receptors in the brain, spinal cord, stomach and intestine. Dried "Papaver somniferum" capsules and stems will, if harvested and dried by the usual protocol, contain significantly lower quantities of thebaine than opium made from latex as well as somewhat more codeine. When ingested, thebaine causes nausea, vomiting, and myoclonus. Thebaine is an important precursor for manufacture of pharmaceuticals, and is more concentrated in the roots of "Papaver somniferum" than elsewhere. Other species of poppies, numbering in the hundreds, do not contain morphine or codeine in useful amounts, but may contain non-narcotic alkaloids like protopine, sanguinarine or berberine. Side effects increase with dosage and include drowsiness, mild stomach ache, lethargy, urinary retention, bradypnea, constipation, nausea, respiratory depression and death. Nausea can be attributed to the presence of noscapine and is more common in first-time or inexperienced users. At high doses, the side effects are dangerous and can cause death through respiratory arrest or inhalation of vomit. Constipation often results from use, as with any opiate. Poppy tea is highly variable in potency, this accounts for almost all deaths related to the substance, assume the tea is a saturated morphine solution when choosing the appropriate dose. Morphine's solubility in water is around 10mgs/ml.  Additionally, frequent use results in high tolerance and dependence. Chemical dependency builds in relation to the frequency of use, dosage, age, sex, weight, and medical condition. Once chemical dependency has developed, abrupt cessation of use will cause withdrawal; symptoms include leg and abdominal cramps, mydriasis, vomiting, diarrhea, headache, insomnia, cravings, lethargy, and anxiety.