| 41. | Codeine is an opiate used to treat pain.
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| 42. | He didn't know it contained codeine, which he is allergic to.
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| 43. | Phenanthrenes such as morphine, codeine, and thebaine are the main psychoactive constituents.
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| 44. | For example, we have two patients who are taking codeine for pain relief.
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| 45. | Dihydrocodeine is used as an alternative or adjunct to codeine for the aforementioned indications.
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| 46. | It is similar in chemical structure to codeine.
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| 47. | Nicodicodeine is a similar drug which is to nicocodeine as codeine is to dihydrocodeine.
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| 48. | It also has a higher bioavailability than codeine.
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| 49. | Codeine suppositories are also marketed in some countries.
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| 50. | Brand named as Phenergan with Codeine or in generic form as promethazine with codeine.
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