Answer
In Beechams All-in-One, paracetamol relieves pain and reduces fever, guaifenesin acts as an expectorant, and phenylephrine hydrochloride acts as a sympathomimetic decongestant.
Sources for this answer
- Beechams All-in-OneHaleon UK Trading Limited · emc · SmPC §5.1 Pharmacodynamic properties · Version 14Document updated
Sources checked