How Long Does Milk of Magnesia Last?
Milk of Magnesia typically remains effective for up to 3 years unopened and 1 month after opening.
Quick Answer
Milk of Magnesia lasts 3 years when unopened. Once opened, it should be used within 1 month.
Shelf Life by Storage Condition
| Storage Condition | Duration |
|---|---|
| Pantry / Room Temp (Unopened) | 3 years |
| After Opening | 1 month |
About Milk of Magnesia
Milk of Magnesia is an over-the-counter antacid and laxative commonly used to relieve constipation and indigestion. Understanding its shelf life is important to ensure its effectiveness and safety, as expired Milk of Magnesia may lose potency or cause adverse effects.
How to Tell If It Has Gone Bad
- Change in color or appearance (e.g., darkening or cloudiness).
- Unusual or foul odor.
- Separation or clumping that does not mix when shaken.
Proper Storage Instructions
- Store at room temperature between 68°F and 77°F (20°C and 25°C).
- Keep the bottle tightly closed when not in use to prevent contamination.
- Avoid exposure to excessive heat, moisture, or direct sunlight.
Safety Notes & Expiration Risks
Do not use Milk of Magnesia past its expiration date as it may lose effectiveness and could potentially cause stomach discomfort or other side effects. If the product shows signs of spoilage, discard it immediately. Always consult a healthcare professional before use, especially for children, pregnant women, or individuals with kidney disease.
Pro Tips
- Always check the expiration date before use and discard if expired.
- Shake the bottle well before each use to ensure even consistency.
Get an Expiration Reminder
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Frequently Asked Questions
How long can I use Milk of Magnesia after opening the bottle?
Once opened, Milk of Magnesia should be used within 1 month to ensure its effectiveness and safety. After this period, the product may degrade or become contaminated.
Is refrigeration necessary for Milk of Magnesia?
No, Milk of Magnesia does not require refrigeration. It should be stored at room temperature away from heat and moisture.
Can expired Milk of Magnesia still be effective?
Using expired Milk of Magnesia is not recommended as the active ingredients may lose potency, reducing effectiveness and potentially causing adverse effects.