There are many brands and forms of guaifenesin and phenylephrine available and not all brands are listed on this leaflet.

Guaifenesin is an expectorant. It helps loosen congestion in your chest and throat, making it easier to cough out through your mouth.

Phenylephrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose).

Guaifenesin and phenylephrine is a combination medicine used to treat stuffy nose and sinus congestion, and to reduce chest congestion caused by the common cold or flu.

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  • Aldex G, Aquatab D, Deconex, Despec, Donatussin Drops, D-Phen 1000, Duravent PE, Gilphex TR, J-Max, Liquibid-PD, Lusair, MucaphEd, Mucinex Children's Cold, PE-Guai, Prolex D, Rescon-GG, Robitussin Head & Chest Congestion, Sudafed PE Non-Drying Sinus, Supress-PE, Triaminic Chest & Nasal Congestion, Xpect-PE
  • Dizziness; excitability; headache; nausea; nervousness or anxiety; trouble sleeping; weakness.

    Seek medical attention right away if any of these SEVERE side effects occur while taking guaifenesin / phenylephrine:
    Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); difficulty urinating; fast or irregular heartbeat; hallucinations; seizures; severe dizziness, lightheadedness, or headache; tremor.
  • (oral liquid, oral tablet, oral suspension, oral tablet, extended release, oral drops, oral capsule, extended release, oral capsule, oral syrup)