Aqoat Grades
There are two major grades of AQOAT. The “L” grade has the most succinyl groups, which helps the product stay soluble. Both grades are described below. These two grades of AQOAT are derived from Creme. Each grade has different release characteristics. If you are unsure which one to buy, consult the following table. It will help you make an informed decision. If you are unsure, contact a reputable company.
Eudragit L30D55
Aqoat Eudragit L30-D55 is an enteric-coated recombinant lactobacillus. This enteric-coated formula has been formulated to maximize viable cell counts after 2 h in an acid medium and a disintegration time of one hour in buffer pH 6.8. The amount of Eudragit L30D-55 in each capsule was determined to correlate with gastric juice resistance. The capsules containing the greatest amount of Eudragit L30D-55 were composed of L. acidophilus, corn starch, lactose monohydrate, and polyvinyl-pyrrolidone. Moreover, capsules containing 12.5 % Eudragit L30D-55 showed the best protective properties and gastric juice resistance.
The release of this drug was monitored using an in vitro method in which the polymer, Eudragit L30 D-55, was coated onto pSi particles. In vitro release of the drug decreased over time, owing to gradual coalescence. The drug release decreased because the film was not completely formed at the end of the coating process. Further, the curing temperature has a stronger impact on drug release than the curing time.
The enteric coating of the pellets showed good enteric properties, with no release of thymidine. The Eudragit L30D-55 and FS30D/L30D-55 mixture showed poor enteric properties, owing to the lag-phase of 20 min. Similarly, the Eudragit FS30D/L30D-55 mixture showed poor enteric properties and thymidine release below pH 6.8.
The enteric-coated polymer on pSi nanoparticles is an acid-resistant layer. The Eudragit L100 polymer is soluble in methanol. The L30D-55 polymer protects the protein payload under acidic gastric conditions. It then releases the protein payload within three hours after entering the target neutral pH range. Further, this coating allows for the efficient release of pSi nanoparticles, thereby reducing the number of side effects in patients with severe hemophilia.
To assess the stability of enteric-coated pellets, Kuang et al. investigated several enteric-coated polymers. These were sequentially applied to an inert core pellet. The resulting formulation was manufactured by a suspension-layering method in a fluidized bed processor. The dissolution profiles and physical characteristics of the resulting pellets were evaluated in vitro. Different kinetic models were used to analyze drug release.
The polymer ratio of the nanoparticles affects their function. Eudragit FS30D contains PLGA nanoparticles loaded with PCLUS3-18IIIB (a CD4 + T cell helper epitope fused to HIV Env CD8+ cytotoxic T lymphocyte epitope) and Eudragit L100-55, which contains TLR ligands. They are both capable of improving glycemic response when combined with insulin. Moreover, a dose of insulin equivalent to 100 IU/kg was successfully delivered via an Eudragit-L30D55-coated nanoparticle loaded with aspart.
Aqoat AS-LF
AQOAT AS-LF is a fast-dissolving tablet that contains 8% acetyl groups and 9% succinoyl groups. Its composition is also compatible with other oral bioactives such as nitrates, tricalcium phosphate, and glycine. Ionic polymers are widely used for enteric coatings and amorphous solid dispersion stabilization. They also contribute to enhanced bioavailability.
Aqoat AS-LF is made of an enteric-coated pellet that is sequentially applied. Duloxetine hydrochloride was sequentially applied to an enteric-coated pellet. It was manufactured using a fluidized-bed processor and the optimal formulation was assessed for its physical and dissolution profiles in vitro. Various kinetic models were used to determine the release mechanism. In addition, the weight gain and the similarity factor for each enteric-coated pellet was evaluated.
HPMCP-HP55
The enteric-coating process is very dependent on temperature. Too high or too low temperatures affect the integrity of the enteric-membrane and the release behavior of the drugs. For the study, three polymers were evaluated with different inlet temperatures: Eudragit(r) L30D55, HPMCP-HP55, and AS-LF. The results showed that these polymers were best suited to a temperature range between 40 and 60 degC.
HPMCP is a monophthalic acid ester of hypromellose. It is commonly used for enteric coatings and has been proven effective in many pharmaceutical applications. HPMCP is available in two grades of solubility: HP-55 and HP-50. You should select the one that best suits your formulation’s needs. It is important to consider the type of formulation you are going to use, as it will affect the solubility.
HPMCP-HP55 was selected as the enteric polymer. It has lower stability than the other two. It is soluble at pH 5.5, which allows it to be incorporated into enteric capsules. HPMCP-HP55 has a lower pH than the other two. However, its pellets have better stability than the other two. Solubility is the key to ensuring the safety of this enteric coating.
HPMCP-HP55 is used in enteric coating and improves drug solubility. Shin-Etsu is a leading company in the cellulose ether business and provides extensive support and guidance. They manufacture high-quality products in Japan and Germany. The company will guide you through the process of choosing the best cellulose ether dispersion for your applications. Its products are also FDA-approved.
The HPMCP-HP55 polymer comes in a variety of viscosities. The particles in the HP-55 range are 0.5-1.0 mm in size. The dissolution pH can be adjusted by adjusting the phthalyl groups. The dissolution pH of HP-HP55 is 5.2 – 5.5. HP-55S is a grade of HPMCP-HP55 with a higher molecular weight and greater film strength.
The enteric-coating formulations of Aqoat HPMCP-HP 55S and Aqoat HPMCP-HPHP55 are different. Eudragit(r) L30D55 requires two hours of curing under 40 degC while HPMCP-HP55 needs more time. Aqoat HPMCP-HP55 can be fully cured at 40/60 degC.
The degradation temperature of HPMCP-HP55 is around 190 to 200degC. The degradation temperature should be considered together with the Tg and melt viscosity. HPMCP-HP55 is an example of a water-insoluble cellulosic polymer. It is an excellent choice for many applications, and one of its strengths is its high MW. It can also be used for filtration purposes.