Promethazine with phenylephrine is a combination medicine used to relieve symptoms of colds and allergies, such as nasal congestion, runny nose, sneezing, and itching.
- What each drug does:
- Promethazine: an antihistamine that reduces allergic symptoms and can help with nausea or help you sleep.
- Phenylephrine: a decongestant that narrows nasal blood vessels to relieve stuffiness.
- Important safety notes:
- Drowsiness is common with promethazine; avoid alcohol and other sedatives.
- Phenylephrine can raise blood pressure and heart rate; use with caution if you have high blood pressure, heart disease, glaucoma, or problems with urination (BPH).
- Promethazine should not be used in children under 2 years old due to serious risk; use with caution in older children.
- This combination can interact with many medicines (other decongestants, MAO inhibitors, sleep aids, alcohol, etc.). Tell your clinician about all medicines you take.
- Not everyone should take this. Pregnant or breastfeeding individuals should consult a clinician.
- Dosing:
- Use exactly as labeled or as prescribed. Dosing varies by product and age; common labels provide dosing every 4–6 hours as needed, with a maximum daily dose. Always follow the package directions or your clinician’s instructions.
If you have a specific question (e.g., is it safe for you, what the exact dose is for a particular age, or potential drug interactions with medicines you’re taking), tell me your age, health conditions, and any other meds you take, and I’ll tailor the info. If you’re considering taking it now, consider talking to a healthcare professional, especially if you have hypertension, heart disease, glaucoma, or are pregnant/nursing.