Is Metronidazole still good after the expiration date? 

Is Metronidazole still good after the expiration date?

Metronidazole tablets can be taken after 3-6 months of their expiration date. However, it is not recommended to take Metronidazole tablets if it has expired for a year or more. 

If we talk about liquid Metronidazole dosage forms, it is strongly not recommended to use them past the expiration date. This is because liquid preparations are more susceptible to bacterial growth because of the high moisture content present in them.

What are the dangers associated with the use of expired Metronidazole?

One of the most commonly reported outcomes of taking expired Metronidazole is a therapeutic failure. This is because Metronidazole starts to lose its potency after it has expired. 

No matter how much you take, your active bacterial infection will not respond to it. In fact, the repeated use of expired Metronidazole can create resistance to this antibiotic in your body. 

This is why it’s best to steer clear of expired antibiotics for an active bacterial infection. Your antibiotic should have its full potency to attack bacterial growth with full force. Otherwise, the bacteria will create resistance. 

This is why it is not recommended by the Food and Drug Administration (FDA) to use expired medications, whether they are antibiotics or any other type of medication (1).

What to do if you have taken expired Metronidazole?

A single-dose administration of expired Metronidazole will not harm you and you don’t have to do anything about it, but you have to make sure that you don’t take that anymore. 

The expired Metronidazole will not help you with your ongoing bacterial infection. This is why it’s best to consult your healthcare provider and get a new prescription. 

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U.S. Food and Drug Administration. Don’t Be Tempted to Use Expired Medicines [Internet]. Silver Spring (MD): U.S. Food and Drug Administration; 2021 [cited 2022 Oct 18]. Available from: