With the advancement in technology, there are many types of capsules in the pharmaceutical and supplements industry. Among the most popular options is acid resistant capsules.
In this article, we shall explore what these capsules are, how they work, available options and their benefits. Let’s get started.
What are Acid Resistant Capsules?
Acid-resistant capsules are designed to withstand the acidic environment of the stomach but dissolve in the higher pH of the small intestine. At times, you can also refer to these capsules are either enteric capsules or gastro-resistant capsules.
How Acid Resistant Capsules Work
Acid-resistant capsules are made with materials that are insoluble in a low pH environment but soluble in a higher pH environment.It usually contains common acid-resistant materials such as hypromellose phthalate, cellulose acetate phthalate, and methacrylic acid copolymers.
In most cases, the capsules will remain intact in the stomach considering the pH is basically around 1.5-3.5.
It plays a major role in protecting sensitive drugs from being degraded by the gastric acid.
Once the acid resistant capsules get to small intestine and the PH rises to about 6 or more, then the shell dissolves. Once the shell dissolves, it releases the active ingredient for absorption in the body.
Types of Acid Resistant Capsules
There are different types of acid resistant capsules as mentioned below:
· Vegetable Acid Resistant Capsules
Vegetable acid resistant capsule made from plant materials, and it is mostly used by vegetarians and vegans. It plays a major role in protecting sensitive ingredients from stomach acid and delivering them to their rightful place.
There are different types of vegetable acid resistant capsules.
Firstly, we have the DR caps. The main material in these capsules are vegetable-based and are built with acid resistance.This type of vegetable acid resistant capsule always dissolves in the intestine at a pH greater than 6.8.
Secondly, there is the EMBO Caps, which plant based with an acid protection formulation.This type of capsule breaks down in the intestine and is suitable for probiotic and acid sensitive compounds.
Thirdly, we have Vcaps enteric, that has enteric properties and delivers acid sensitive ingredients to the small intestine.This type of vegetable capsule is mostly used in pharmaceuticals and high-end nutraceuticals.
· Gelatin Acid Resistant Capsules
Gelatin acid resistant capsules are a type of gastro-resistant capsules made to protect their content from the acidic environment of your stomach. As the name suggests, these are gelatin capsulesmade from animal products but can also resist stomach acids.
These animal products may include bones, and collagen among others.
Again, there are many gelatingastro-resistant capsules in the market. The most common option is the enteric coated gelatin capsule.
Enteric coated gelatin capsules, which are coated with a sensitive polymer. These coatings are resistant to your stomach acid but usually dissolve in the small intestine at a higher PH.
Depending on your capsule filling needs, you can modify these capsules to have unique formulations. It may include modifying sizes, outer and inner shell structure. For example, the outer shell combines fast and delayed release in one capsule.
Benefits of Capsules with Acid Resistance
· Protect Sensitive Ingredients
Capsules with acid resistance protect sensitive ingredients such as probiotics and enzymes that are likely to be destroyed by stomach acid.It usually safeguards them until they reach the intestine.
· PreventingStomach Irritation
They prevent stomach irritation because they pass intact through the stomach, preventing any irritation of the stomach lining that can cause ulcers or nausea.
· Helps to Improve Effective Absorption
It helps to improve effectiveness and absorption by allowing the medication to act where it is supposed to.Additionally, it plays a major role in managing chronic conditions.
· Low Moisture Content
Low moisture levels enhance longevity and shelf life.
· Target Intestinal Absorption
It protects the ingredient, ensuring its release in the small intestine, thus improving bioavailability for compounds better absorbed at a higher pH level.
· Enhance Patient Compliance
A capsule with acid resistance helps to reduce side effects such as nausea or reflux.It also helps to smooth the digestion experience, thus making it easier for patients to continue their regimen.
· Compatible with Dietary
Acid resistant capsules are manufactured with plant base materials, making them to be vegan friendly, allergen free among others.
· Minimizes Aftertaste
Enteric coating usually delays breakdown until the capsule reaches your intestine, thus avoiding taste related issues.
· Prolonged Shelf Life
It protects ingredients from any acidic degradation, helps to extend the stability and shelf life of the drug, and supplements.
· Enables Targeted Drug Delivery
Acid resistant capsules ensures that the delivery of the drug is done at the right part of the right part of the digestive system.This helps in playing a major role in ensuring the drugs treat different kinds of diseases present in the colon or small intestine.
Key Uses of Capsules with Acid Resistance
· Target Intestinal Delivery
These capsules help to ensure that the content is released where absorption is most effective and where local treatment is needed, such as the small intestine or colon.
· Veterinary Medicine
Acid resistant capsules are used in animal health products to deliver medications or probiotics that must pass through the stomach, mostly in monogastric animals such as pigs and dogs.
· Nutraceuticals and Herbal Remedies
It plays a major role in protecting delicate vitamins from being broken before reaching the bloodstream.
· Modified Release Formulation
A capsule with acid resistance is used in delayed release, or it controls the release application where the timing of the drug release matters.
FAQs
1. Are HPMC capsules acid resistant?
No. They are not acid resistant because they dissolve in both acidic and neutral environments.
2. Are acid resistant capsules the same as enteric coated capsules?
Acid resistant capsules and enteric coated capsules are not the same, and they play different roles in the body.
3. Where do AR-Caps Dissolve?
AR-Caps dissolve in the intestine at a higher PH.
4. Are delayed release capsules acid resistant?
Yes, most delayed release capsules are resistant.
Conclusion
Clearly, acid resistant capsules have changed how drugs are delivered. With the ability to resist stomach acid, it helps deliver drugs in the small intestine.
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