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Dihydrocodeine / guaifenesin / phenylephrine Side Effects
Applies to dihydrocodeine / guaifenesin / phenylephrine: syrup
Check with your doctor if any of these most COMMON side effects persist or become bothersome:
Seek medical attention right away if any of these SEVERE side effects occur while taking dihydrocodeine / guaifenesin / phenylephrine:
Constipation; dizziness; drowsiness; excitability; headache; nausea; nervousness or anxiety; tiredness; trouble sleeping; vomiting; weakness.
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); blurred vision or other vision changes; confusion; difficulty urinating; fainting; fast, slow, or irregular heartbeat; hallucinations; mental or mood changes; persistent trouble sleeping; seizures; severe dizziness, lightheadedness, or headache; severe drowsiness; shallow or very slow breathing; tremor; uncontrolled muscle movement.
Not all side effects for dihydrocodeine / guaifenesin / phenylephrine may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.
More about dihydrocodeine/guaifenesin/phenylephrine
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- Drug class: upper respiratory combinations
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