Tirohia te wāhanga i raro nei, kātahi ka whakautu i te pātai i muri mai i te reo kotahi me te wāhanga:  Whakawhiti: Ko etahi rongoa ka whakaiti i te paanga o te pire ka taea te whakaputa toto, te whakanui ake ranei i te tupono o te haputanga. Kei roto i ēnei ko ngā rongoā pērā i te rifampicin, ngā barbiturates, te phenytoin me te carbamazepine. I tua atu ka whakawhiwhia he whakatupato mo nga rauropi whanui, penei i te ampicillin me te doxycycline, ka raru pea "ma te whakakorehia o te tipu huakita e kawenga ana mo te tukurua o te ethinylestradiol mai i te puku nui" (BNF 2003).Ko te otaota rongoa tuku iho a St John's Wort kua uru hoki na te mea ka whakaarahia te punaha P450 i te ate.  Pātai: he aha te mea e whakaiti ana i ngā pānga
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