Codeine results in miosis, even in overall darkness. Pinpoint pupils are a sign of opioid overdose but are certainly not pathognomonic (eg, pontine lesions of hemorrhagic or ischemic origins could produce similar results). Marked mydriasis instead of miosis could possibly be noticed as a consequence of hypoxia in overdose conditions. https://elliottnzaaa.ampedpages.com/top-guidelines-of-promethazine-codeine-54811408