List of Excipients in Branded Drug QUINAPRIL HYDROCHLORIDE AND HYDROCHLOROTHIAZIDE

Company	Tradename	Ingredient	NDC	Excipient	Potential Generic Entry
Greenstone LLC	QUINAPRIL HYDROCHLORIDE AND HYDROCHLOROTHIAZIDE	quinapril hydrochloride and hydrochlorothiazide	59762-0222	CANDELILLA WAX
Greenstone LLC	QUINAPRIL HYDROCHLORIDE AND HYDROCHLOROTHIAZIDE	quinapril hydrochloride and hydrochlorothiazide	59762-0222	CROSPOVIDONE
Greenstone LLC	QUINAPRIL HYDROCHLORIDE AND HYDROCHLOROTHIAZIDE	quinapril hydrochloride and hydrochlorothiazide	59762-0222	FERRIC OXIDE RED

Generic Drugs Containing QUINAPRIL HYDROCHLORIDE AND HYDROCHLOROTHIAZIDE

Company	Ingredient	NDC	Excipient
Camber Pharmaceuticals	quinapril hydrochloride and hydrochlorothiazide	31722-374	CROSPOVIDONE
Camber Pharmaceuticals	quinapril hydrochloride and hydrochlorothiazide	31722-374	FERRIC OXIDE RED
Camber Pharmaceuticals	quinapril hydrochloride and hydrochlorothiazide	31722-374	HYPROMELLOSES

What are the Most Frequently-Used Excipients in QUINAPRIL HYDROCHLORIDE AND HYDROCHLOROTHIAZIDE?

# Of NDCs	Excipient
2	CELLULOSE, MICROCRYSTALLINE
3	CROSPOVIDONE
3	FERRIC OXIDE RED

Excipient Strategy and Commercial Opportunities for Quinapril Hydrochloride and Hydrochlorothiazide

Last updated: February 26, 2026

What is the role of excipients in the formulation of Quinapril Hydrochloride and Hydrochlorothiazide?

Excipients are inactive substances that stabilize, enhance, or facilitate drug delivery. For Quinapril Hydrochloride, an ACE inhibitor, and Hydrochlorothiazide, a diuretic, excipient selection impacts stability, bioavailability, and patient compliance. Notable functions include improving solubility, controlling release rates, masking taste, and protecting active ingredients from environmental degradation.

How do excipient strategies differ for Quinapril Hydrochloride versus Hydrochlorothiazide?

Quinapril Hydrochloride

• Requires excipients that enhance chemical stability, as ACE inhibitors are sensitive to moisture and temperature.
• Common excipients include microcrystalline cellulose as a filler, croscarmellose sodium as a disintegrant, and magnesium stearate as a lubricant.
• Film coatings often contain hydroxypropyl methylcellulose to improve stability and mask taste.

Hydrochlorothiazide

• Needs excipients that improve water solubility due to its low aqueous solubility.
• Use of sodium carbonate or citric acid may be implemented to improve dissolution.
• Excipients like povidone can enhance wettability, while hypromellose can provide sustained-release formulations.

What are the key benefits companies seek from excipient optimization?

• Enhanced stability: Protect active ingredients from moisture, oxygen, and light.
• Improved bioavailability: Facilitate faster dissolution and absorption.
• Controlled release: Maintain therapeutic levels over extended periods.
• Patient compliance: Mask unpleasant tastes or reduce pill size.

What are common excipient types used in formulations of these drugs?

Excipient Type	Function	Examples
Fillers and diluents	Volume expansion, tablet formation	Microcrystalline cellulose, lactose
Disintegrants	Pill break-up after ingestion	Croscarmellose sodium, sodium starch glycolate
Binders	Hold ingredients together	Povidone, starch
Lubricants	Reduce friction during manufacturing	Magnesium stearate, stearic acid
Coatings	Protect stability, improve taste	Hydroxypropyl methylcellulose, polyethylene glycol

What are the commercial implications of excipient variability?

• Regulatory standards enforce consistent excipient quality, directly influencing manufacturing costs.
• Patent strategies may incorporate novel excipients to extend exclusivity.
• Formulation differences can impact bioequivalence, affecting market approval for generic versions.
• Supply chain reliability of excipients affects manufacturing continuity and cost management.

How can excipient strategies create market differentiation?

• Developing formulations with optimized bioavailability or extended-release profiles can command premium pricing.
• Using excipients that improve stability to extend shelf life reduces distribution costs.
• Incorporating excipients that mask taste or reduce pill size can improve patient adherence, boosting market acceptance.
• Innovating with excipients that enable lower dosing or combination pills can streamline treatment regimens.

What are recent trends and innovations in excipient use for these drugs?

• Use of multifunctional excipients that combine multiple roles (e.g., disintegrant and binder).
• Development of excipients for controlled-release formulations to improve dosing convenience.
• Adoption of non-viral excipients for enhanced stability and safety profiles.
• Focus on excipients derived from natural sources to meet regulatory and consumer demands.

What are the strategic and regulatory considerations?

• Regulatory agencies such as the FDA and EMA require comprehensive excipient safety profiles.
• Excipient purity, source, and batch-to-batch consistency influence approval timelines.
• Patent landscapes may favor novel excipient combinations to extend exclusivity.
• Global supply chain risks demand diversified sourcing.

Key Takeaways

• Excipient optimization is critical for stability, bioavailability, and patient compliance of Quinapril Hydrochloride and Hydrochlorothiazide.
• Companies leverage excipient selection for product differentiation, cost control, and regulatory advantage.
• Trends point toward multifunctional, natural, and controlled-release excipients to meet market and regulatory demands.
• Regulatory compliance influences ingredient choice and manufacturing consistency.
• Strategic innovations in excipient use can open new commercial opportunities in formulation development.

FAQs

1. How do excipients impact drug stability? Excipients like antioxidants and moisture protectants prevent chemical degradation and physical instability.

2. Can excipient variations affect bioequivalence? Yes, differences in excipients can alter dissolution and absorption profiles, impacting regulatory approval.

3. Are there patented excipients specifically for these drugs? Some companies develop proprietary excipient formulations, offering patent opportunities in branded and generic markets.

4. What are challenges in sourcing excipients for these formulations? Variability in purity, supply chain disruptions, and compliance with pharmacopeial standards.

5. How do regulatory agencies view natural versus synthetic excipients? Natural excipients are increasingly favored, provided they meet safety and consistency standards required by regulatory authorities.

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References

[1] U.S. Food and Drug Administration. (2021). Guidance for Industry: Excipients.
[2] European Medicines Agency. (2022). Guidelines on excipients in the labels and package leaflet of medicinal products for human use.
[3] Singh, A. K., & Singh, T. (2020). Excipient selection strategies for controlled release drug delivery systems. International Journal of Pharmaceutical Sciences and Research, 11(8), 3501-3508.