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Geri-Tussin expectorant

Generic name: guaifenesin [gwye-FEN-e-sin]
Brand names: Allfen, Bidex-400, Diabetic Tussin Chest Congestion, Fenesin IR, Geri-Tussin Expectorant,… Show all 25 brands
Drug class: Expectorants

What is GeriTussin?

Use Geri-Tussin expectorant to relieve chest congestion due to the common flu or chronic respiratory bronchitis.Geri-Tussin expectorant is a product that helps to loosen up congestion and coughing in the chest, throat, and lungs.Guaifenesin is available in many different brands. This leaflet does not list all available brands.This medication guide does not list all possible uses for Geri-Tussin expectorant.

Side effects of Geri-Tussin expectorant

If you experience any of the following symptoms of an allergy reaction, seek immediate medical attention: difficulty breathing, hives, swelling in your lips, face, throat, or tongue.Geri-Tussin expectorant can cause the following side effects:

  • nausea;
  • vomiting.

There may be other side effects.For medical advice regarding side effects, call your physician immediately. Report side effects by calling the FDA at 1-800-FDA-1088.


If you suffer from health issues, take other medications, are breastfeeding, or are pregnant, you should consult a physician or pharmacist prior to using Geri Tussin Expectorant.

Before you take this drug

If you have an allergy to Geri-Tussin Expectorant, then it is best not to use this product.If you are suffering from other health conditions, ask your doctor or pharmacist whether it's safe to take this medication.Consult your doctor if you're pregnant before taking this medication.Geri-Tussin expectorant should not be used while breastfeeding.

How to take Geri Tussin Expectorant?

Follow the instructions on the bottle or those prescribed by your physician. Cough and cold medicine should only be used for a short time until symptoms disappear.Follow the directions provided on the label when giving a cough medicine or cold medication to your child. Never use cough and cold medicine to put a young child to sleep.Measuring liquid medication is important. Dosing devices are available.Pour the whole packet of Geri-Tussin expectorant on your tongue, and then swallow it without chewing.If your symptoms don't improve within 7 days or you experience a fever, rash, or headache, call your doctor.Geri-Tussin expectorant may affect certain medical tests. Inform any doctors who treat you that you use Geri-Tussin Expectorant.Keep away from heat and moisture. Store at room temperature away from moisture and heat sources.

What happens if I miss the dose?

You may not have a schedule for your cough and cold medication, as you only use it when necessary. If it is almost time for your next dose, skip the one you missed. Never take two doses in one go.

What happens if I overdose?

Call 1-800-222-1222 for poison help or seek immediate medical attention.

Avoid this

Before using any other cold or cough medicines, ask your doctor or pharmacist if they contain the same ingredients.You should avoid driving and other hazardous activities until you are sure how Geri Tussin Expectorant affects you. You may be unable to react properly.

Interaction with other drug

This medicine should not be taken with any other medications that may cause sleepiness or reduce your ability to breathe (such as muscle relaxers, opioids, and medicines for anxiety or seizures). Before using other medications, such as vitamins and herbs, consult your doctor or pharmacist. This medication guide does not list all possible interactions with other drugs.




Prescription only

Pregnancy & Lactation

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