Chloe Zhang
Capsules are solid dosage forms that enclose medication in a stable shell, allowing for oral administration or use as suppositories. The two main types of capsules are hard-shelled and soft-shelled. Hard-shelled capsules are typically made from gelatin derived from animal protein or plant polysaccharides and their derivatives, while soft-shelled capsules are primarily used for oils and oil-soluble active ingredients. The coating of hard capsules has a plastic-like texture and appearance, which has sparked concerns about the presence of plastic in medications. While the plastic-like shell is not conventional plastic, it shares similar chemical properties and can be made from organic polymers based on digestible chemicals like sugar or starch. These coatings are preferred due to their durability, ease of manufacturing, and ability to protect the medication inside. However, the potential health impacts of plastic additives in pills, particularly phthalates, have been a subject of recent research.
| Characteristics | Values |
|---|---|
| Reason for coating | To improve the taste, protect the medication and improve the drug's bioavailability |
| Composition | Plasticising chemicals, gelatin, animal protein, plant polysaccharides, carrageenans, modified starch, cellulose, plasticizers, glycerin, sorbitol, colouring agents, preservatives, disintegrants, lubricants, surface treatment |
| Plasticizers function | Decrease the capsule's hardness |
| Concerns | Plastic additives may be harmful to health |
| Alternative | Vegetable-based gelatin substitutes |
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What You'll Learn
- Plastic coating may be used to slowly release ingredients into the body
- Plastic coating can make capsules flavourless, masking unpleasant-tasting medication
- Plastic coating can improve drug bioavailability by protecting the capsule until it reaches the stomach
- Plastic coating can be used to make capsules more durable and easier to manufacture
- Plastic coating may be used to make capsules more palatable
Plastic coating may be used to slowly release ingredients into the body
Plastic coating on capsules may be used to slowly release ingredients into the body. This method of drug delivery has been used for ages. The coating that makes up those hard, clear capsule shells is conventionally made from hardened gelatin, which is typically produced from processing livestock byproducts. The two main types of capsules are hard-shelled and soft-shelled. Hard-shelled capsules contain dry, powdered ingredients or miniature pellets, while soft-shelled capsules are primarily used for oils and active ingredients that are dissolved or suspended in oil. Both types of capsules are made from aqueous solutions of gelling agents, which can be derived from animal protein (mainly gelatin) or plant polysaccharides.
The use of plastic coating allows the capsule to reach the stomach or intestine before releasing the medication, potentially improving the drug's bioavailability. This is because the plastic coating acts as a watertight container, protecting the dry medication inside. In addition, the plastic coating may help to mask any unpleasant tastes or odours associated with the medication, making it more palatable for the patient.
Some capsules may also contain plasticizing chemicals, such as phthalates, which are designed to release the ingredients into the system more slowly. However, it is important to note that these plastic additives have been linked to potential health risks. Researchers have found that certain phthalates may contribute to lifelong health problems. As a result, it is recommended to avoid medications labelled with terms like "enteric-coated", "time release", or "film coated", as these may contain higher levels of phthalates.
It is worth mentioning that the term "plastic coating" can be misleading. While the capsules may have a plastic-like appearance and properties, they are not made of traditional plastic. Instead, they are typically made from biodegradable materials, including gelatin derived from plants and animals. These capsules are designed to dissolve in the body, releasing the medication. This is supported by the observation that if left in water or held in the mouth for an extended period, the capsules start to dissolve.
Overall, the plastic coating on capsules plays a crucial role in the controlled release of medication into the body. However, it is important to be aware of the potential presence of plasticizing chemicals and their associated health risks.
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Plastic coating can make capsules flavourless, masking unpleasant-tasting medication
Plastic coating on capsules is a topic of controversy, with some people expressing concern about ingesting plastic. However, it is important to clarify that the coating on medicinal capsules is typically not pure plastic. While the coating may visually resemble plastic and possess similar physical properties, it is made from biodegradable materials derived from plants and animals.
The coating of traditional hard-shelled capsules is typically composed of hardened gelatin, which is produced by processing livestock byproducts such as bones, connective tissues, and skin. This gelatinous material acts as an efficient carrier for medication, offering minimal flavour interference and protecting the dry medication inside. The watertight nature of the coating ensures the capsule reaches the stomach or intestine before releasing its contents, potentially enhancing the drug's bioavailability.
The gelatinous coating is also designed to dissolve in the acidic environment of the stomach, allowing the medication to be effectively released and absorbed by the body. This dissolution process distinguishes the capsule coating from plastic, as plastic would simply pass through the body intact. The absence of negative effects associated with the dissolution of gelatin in the body further reinforces its distinction from plastic.
It is worth noting that the term "plastic" in the context of capsule coatings may refer to the use of plasticizers, which are added to decrease the capsule's hardness and improve flexibility. Common plasticizers include glycerin or sorbitol, which, despite sharing the "plastic" moniker, are not the same as the plastic materials found in vinyl flooring or shower curtains.
While the plastic-like coating serves an important function, some consumers may still prefer alternatives due to dietary restrictions or gastrointestinal issues associated with gelatin. For those adhering to a vegan or vegetarian lifestyle, or experiencing allergic responses to gelatin, plant-based capsules offer a suitable substitute. These capsules utilise combinations of water and hydroxypropylmethylcellulose (HPMC) or pullulan to replicate the properties of conventional capsule coatings without the use of animal-derived gelatin.
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Plastic coating can improve drug bioavailability by protecting the capsule until it reaches the stomach
Plastic coating on pills is a cause for concern for many people. Firstly, it is important to note that the plastic-like coating on pills is not made of conventional plastic. Instead, it is made from polymers based on digestible chemicals such as sugar, starch, or cellulose. These polymers are biodegradable and have the same desirable properties as plastic, such as being hard, tough, and water-tight. They also have the advantage of being easy to manufacture.
Despite not being conventional plastic, the plastic-like coating on pills can still be controversial. This is especially true for people with specific dietary restrictions, such as vegetarians and vegans, who may oppose consuming capsules derived from animal gelatin. Additionally, some individuals experience gastrointestinal issues or allergic responses to gelatin capsules, particularly those made from beef or pork.
The plastic coating on pills serves an important function. It acts as a protective barrier, ensuring that the capsule remains intact until it reaches the stomach or intestine. This helps improve drug bioavailability by preventing the medication from being released too early in the digestive tract. This method of drug delivery has been used for ages due to its effectiveness.
However, there are potential health concerns associated with certain plastic additives used in pills. Researchers have found that some plasticizing chemicals, such as phthalates, may be linked to lifelong health problems. These chemicals are designed to release the ingredients into the system more slowly but could potentially make individuals sick. It is important for consumers to be aware of the presence of these additives and make informed choices to ensure their safety.
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Plastic coating can be used to make capsules more durable and easier to manufacture
The use of plastic coating in capsules is a topic of debate, with some sources claiming that capsules are coated with gelatin, not plastic. However, it is important to note that the term "plastic" can refer to a range of polymer materials, some of which are digestible.
That being said, plastic coating can provide several benefits that make capsules more durable and easier to manufacture. Firstly, plasticizers, which are a type of plastic, can be added to the gelling agent solution to decrease the capsule's hardness and improve its flexibility. This makes the capsules more durable and less prone to breaking or cracking during transportation and storage.
Additionally, plastic coatings can act as a protective barrier, preventing the capsules from sticking together during the manufacturing process. This is especially useful for soft gel capsules, which are more delicate and prone to sticking. By using plastic coatings, manufacturers can improve the efficiency and yield of their production processes, reducing waste and costs.
Furthermore, plastic coatings can enhance the stability and shelf life of capsules. The watertight nature of plastic coatings helps to protect the capsules from moisture, preventing the medication inside from becoming damp or spoiled. This is particularly beneficial for medications that are sensitive to moisture or have a long shelf life.
Plastic coatings can also be used to control the release of the medication. By using plasticizers or enteric coatings, the rate at which the medication is released into the body can be regulated. This is often referred to as "time-release" or "enteric-coated" medication. This technology ensures that the active ingredients are released at the desired location in the body, such as the stomach or intestine, optimizing their effectiveness.
While plastic coatings offer these advantages, it is important to consider potential health concerns associated with certain plastic additives. Some studies have found that specific plasticizing chemicals, such as phthalates, can be linked to lifelong health problems. Therefore, it is crucial for consumers to be aware of the ingredients in their medications and supplements and make informed choices to ensure their safety.
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Plastic coating may be used to make capsules more palatable
However, it is important to note that the term "plastic" in this context may be misleading. While the coating may look and feel like plastic, it is not the same plastic found in other products like vinyl shower curtains or cleaning agents. The capsules are made from biodegradable materials extracted from plants and animals. Gelatin capsules, for example, dissolve in stomach acid and have no negative effects on the body.
That being said, there are concerns about certain additives in pill coatings. Some pills contain plasticizing chemicals like phthalates, which are also found in vinyl products and personal care items. These additives are designed to release the ingredients into the body more slowly but have been linked to potential health risks. To avoid exposure to phthalates, consumers can look for labels that indicate the presence of these chemicals, such as "enteric coated," "time release," or "film coated."
Additionally, for those who follow a vegetarian or vegan lifestyle, or experience gastrointestinal issues with animal-based gelatin, there are now more options available. Some drug makers offer hard-shelled pills made from vegetable-based gelatin substitutes, such as water and hydroxypropylmethylcellulose (HPMC) or pullulan. These alternatives provide a similar function to traditional gelatin capsules while aligning with specific dietary preferences or addressing potential allergies and sensitivities.
In summary, while the term "plastic coating" may be used to describe the outer layer of medical capsules, it is not the same plastic found in other products. The coating serves an important function in making capsules more palatable and protecting the medication inside. However, consumers should remain vigilant about the presence of potentially harmful additives and choose alternatives that align with their dietary preferences or health considerations.
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Frequently asked questions
Capsules are not coated with plastic, but with gelatin, a polymer with similar properties to plastic. Gelatin is a gelling agent derived from animal protein or plant polysaccharides.
Hard-shelled capsules have little to no flavour, making them ideal carriers for unpleasant-tasting medication. They also allow the capsule to reach the stomach or intestine before releasing the medication, potentially improving the drug's bioavailability.
Yes, there are now more options than ever for those who do not want to consume animal products. Some drug makers now offer hard-shelled pills made from vegetable-based gelatin substitutes, using a combination of water and hydroxypropylmethylcellulose (HPMC) or pullulan.
