Syn-Rx Oral
Generic Name: GUAIFENESIN & GUAIFENESIN W/PSEUDOEPHEDRINE KIT - ORALPronounced: (gweye-FEN-eh-sin/sue-doh-eff-ED-rin)
Syn-Rx Oral Side Effects
Nausea, headache, loss of appetite, nervousness, or dizziness, or rash may occur. If any of these effects persist or worsen notify your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor immediately if you develop any of these serious side effects:
- blurred vision
- unusually fast heartbeat
- difficulty urinating (men only)
- trouble sleeping
Tell your doctor immediately if you develop any of these unlikely but serious side effects:
- chest pain
- irregular heartbeat
- mental/mood changes
- convulsions
If you notice other effects not listed above, contact your doctor or pharmacist.
Syn-Rx Oral Precautions
Tell your doctor your medical history, especially of:
- high blood pressure
- heart problems
- diabetes
- glaucoma
- thyroid problems
- enlarged prostate
- seizures
- allergies (especially to other cough-and-cold products)
Because this medication may make you dizzy, use caution engaging in activities requiring alertness such as driving or using machinery. Limit alcoholic beverages.
Elderly patients may be more sensitive to the effects of this product. Use cautiously.
This drug should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor.
The pseudoephedrine in this combination product passes into breast milk and may have undesirable effects on a nursing infant. Therefore, this product is not recommended for use by nursing mothers.
Syn-Rx Oral Drug Interactions
Tell your doctor of all prescription and nonprescription medications you may use, especially:
- beta-blockers (e.g., metoprolol, propranolol)
- digoxin
- stimulant medications (e.g., dextroamphetamine, methylphenidate)
- certain other high blood pressure medicine (e.g., guanethidine, methyldopa, reserpine)
- cough-and-cold products
- certain drugs used for depression (e.g., tricyclic antidepressants)
Do not use this medication if you have taken an MAO inhibitor (e.g., furazolidone, linezolid, moclobemide, phenelzine, procarbazine, selegiline) within the last 14 days.
The guaifenesin in this product may interfere with certain laboratory tests (e.g., uric acid).
Do not start or stop any medicine without doctor or pharmacist approval.
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