Patients take guaifenesin tablets to ease congestion in the chest, allowing them to cough easily, explains Drugs.com. Doctors prescribe this medication for patients experiencing chest congestion due to allergies or a common cold. This medication helps to ease the symptoms, but it does not help in recovery or treat the cause of the condition, notes MedlinePlus.
Patients who are allergic to this medication should not use it, according to Drugs.com. Children below the age of 4 should not take guaifenesin tablets. A patient should drink additional fluids when taking the tablets to help in relaxing chest congestion. It is not advisable to crush, chew or break the tablet before taking it because doing so leads to the release of too much drug at once.
Possible side effects of taking guaifenesin tablets include a rash, nausea, vomiting, stomach upset and dizziness, notes Drugs.com. Patients who are allergic to the tablets may experience difficulty breathing, hives and swelling of the lips and face. Some drugs are more likely to interact with guaifenesin tablets, so patients must inform the doctor about any current medications and supplements. Additionally, guaifenesin may impair thinking, so it is necessary to be cautious while driving after taking guaifenesin tablets.