See the DrugPatentWatch profile for Promethazine
What is “promethazine codeine” and what is it used for?
Promethazine with codeine is a combination medicine that’s typically used to treat cough, especially a cough that is associated with mucus/irritation and that needs a sedating antihistamine plus an opioid antitussive (codeine). Promethazine is an antihistamine with sedating effects, and codeine is a pain/opioid medicine that can also suppress coughing.
What are the common side effects and risks?
Because the product combines a sedating antihistamine (promethazine) and an opioid (codeine), side effects can include drowsiness, dizziness, constipation, and nausea. The opioid component raises safety concerns such as slowed or difficult breathing, especially if taken at higher doses or mixed with other depressants.
Patients are generally warned to avoid alcohol and other sedating medicines while taking it, since the effects on alertness and breathing can add up.
Can it be dangerous for kids or during pregnancy?
Products containing codeine have major age- and risk-related restrictions in many places because children can be more vulnerable to serious breathing problems with codeine. Pregnancy and breastfeeding also carry additional risk considerations for opioids, and clinicians usually assess whether an alternative is safer.
What happens if someone misses a dose or takes too much?
If taken more than prescribed, the main concerns are excessive sedation and respiratory depression (slow/shallow breathing). If symptoms like extreme sleepiness, trouble staying awake, confusion, or slowed breathing occur, urgent medical attention is needed.
Are there alternatives to promethazine-codeine cough syrups?
Clinicians often consider other cough options depending on the cause of the cough (viral illness, allergies, asthma, reflux, etc.). Alternatives may include non-opioid cough medicines, antihistamines without codeine, or treatments aimed at the underlying cause.
How to identify the exact product and strength
Because “promethazine codeine” can refer to different formulations (and different strengths), the exact labeling matters. The bottle/box should show:
- promethazine amount (mg per mL or mg per tablet)
- codeine amount (mg per mL or mg per tablet)
- dosing instructions and age guidance
If you share the label details (strength and form), I can help interpret what it means and what typical dosing instructions say.
Sources
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