Why medicines are kept in aluminium foil?

Updated : Dec. 19, 2023
Table of Contents
  1. Reasons why drugs are packaged in aluminum foil
  2. The Alloy Behind the Shield: Understanding Aluminum Foil Composition
  3. Conclusion

In the realm of pharmaceuticals, the packaging of medicines is a critical component that goes beyond mere aesthetics. Among the various materials used for medicinal packaging, aluminum foil stands out as a champion in safeguarding the potency and stability of drugs.

medicinal packaging

Reasons why drugs are packaged in aluminum foil

1. Protection from Light: Aluminum foil provides an effective barrier against light, which can degrade certain medications. Exposure to light, especially sunlight or artificial light, can lead to chemical reactions in some drugs, reducing their effectiveness or even causing them to become harmful.

2. Moisture Barrier: Aluminum foil is impermeable to moisture and gases, helping to protect medications from humidity and environmental moisture. Moisture can alter the chemical composition of some drugs, leading to degradation or loss of potency.

3. Oxygen Barrier: Aluminum foil also acts as a barrier to oxygen. Oxygen can cause oxidation, leading to the deterioration of some medications. By preventing oxygen from reaching the medication, the foil helps to maintain the drug's stability and efficacy.

4. Tamper Evidence: Aluminum foil is often used as a seal for pharmaceutical packaging. It provides a tamper-evident barrier, ensuring that the medicine has not been opened or tampered with before reaching the end-user. The foil is typically sealed to the container, and any attempt to open it is visible.

5. Durability and Portability: Aluminum foil is lightweight, durable, and flexible, making it a practical choice for packaging. It can be easily folded, sealed, and molded to the shape of the medication packaging. This makes it convenient for both manufacturers and consumers.

6. Long Shelf Life: The combination of light, moisture, and oxygen protection provided by aluminum foil contributes to extending the shelf life of medications. This is crucial for ensuring that the drugs remain safe and effective for an extended period.

drugs are packaged in aluminum foil

The Alloy Behind the Shield: Understanding Aluminum Foil Composition

A. Aluminum Alloys in Pharmaceutical Packaging

Not all aluminum foils are created equal. The composition of aluminum foil varies, and the choice of alloy depends on specific requirements, such as flexibility, strength, and thickness.

B. Alloy 8011: A Preferred Choice

Among the myriad of aluminum alloys, 8011 emerges as a preferred choice for pharmaceutical packaging. Alloy 8011 that make it well-suited for medicinal applications.


In the intricate world of pharmaceuticals, where precision and protection are paramount, aluminum foil emerges as a stalwart guardian. From its role as a barrier against environmental elements to the specific alloy choices that optimize its properties, aluminum foil stands as a testament to the innovative strides in pharmaceutical packaging.

As technology advances and new challenges emerge, the role of aluminum foil in medicinal packaging continues to evolve, ensuring that the medications we rely on remain safe, effective, and untarnished by the ravages of time.

Related Topics: Pharmaceutical Aluminum Aluminium Blister

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