Note: This page contains information about the side effects of guaifenesin / phenylephrine / pyrilamine. Some of the dosage forms included on this document may not apply to the brand name A-Tan 12X.
Not all side effects for A-Tan 12X may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.
Applies to guaifenesin / phenylephrine / pyrilamine: suspension, tablets
Check with your doctor if any of these most COMMON side effects persist or become bothersome:
Constipation; diarrhea; dizziness; drowsiness; excitability; headache; loss of appetite; nausea; nervousness or anxiety; trouble sleeping; upset stomach; vomiting; weakness.Seek medical attention right away if any of these SEVERE side effects occur while taking guaifenesin / phenylephrine / pyrilamine:
Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); difficulty urinating or inability to urinate; fast or irregular heartbeat; hallucinations; seizures; severe dizziness, lightheadedness, or headache; tremor; trouble sleeping; vision changes.
Applies to guaifenesin / phenylephrine / pyrilamine: oral suspension, oral tablet
Nervous system side effects have included nervousness, restlessness, headache, drowsiness, and sedation.[Ref]
Gastrointestinal side effects have included nausea and vomiting.[Ref]
Dermatologic side effects have included rash, in addition to urticaria.[Ref]
General side effects have included dryness of mucous membranes.[Ref]