List of Excipients in Branded Drug SILDENAFIL

Company	Tradename	Ingredient	NDC	Excipient	Potential Generic Entry
PD-Rx Pharmaceuticals Inc	SILDENAFIL	sildenafil citrate	43063-550	ANHYDROUS DIBASIC CALCIUM PHOSPHATE
PD-Rx Pharmaceuticals Inc	SILDENAFIL	sildenafil citrate	43063-550	CELLULOSE, MICROCRYSTALLINE
PD-Rx Pharmaceuticals Inc	SILDENAFIL	sildenafil citrate	43063-550	CROSCARMELLOSE SODIUM
PD-Rx Pharmaceuticals Inc	SILDENAFIL	sildenafil citrate	43063-550	HYPROMELLOSE
PD-Rx Pharmaceuticals Inc	SILDENAFIL	sildenafil citrate	43063-550	LACTOSE MONOHYDRATE
PD-Rx Pharmaceuticals Inc	SILDENAFIL	sildenafil citrate	43063-550	MAGNESIUM STEARATE
PD-Rx Pharmaceuticals Inc	SILDENAFIL	sildenafil citrate	43063-550	TITANIUM DIOXIDE

Generic Drugs Containing SILDENAFIL

Company	Ingredient	NDC	Excipient
Teva Pharmaceuticals USA, Inc.	sildenafil	0093-5341	ANHYDROUS DIBASIC CALCIUM PHOSPHATE
Teva Pharmaceuticals USA, Inc.	sildenafil	0093-5341	CELLULOSE, MICROCRYSTALLINE
Teva Pharmaceuticals USA, Inc.	sildenafil	0093-5341	CROSCARMELLOSE SODIUM
Teva Pharmaceuticals USA, Inc.	sildenafil	0093-5341	MAGNESIUM STEARATE
Teva Pharmaceuticals USA, Inc.	sildenafil	0093-5341	POLYETHYLENE GLYCOL 3350
Teva Pharmaceuticals USA, Inc.	sildenafil	0093-5341	POLYVINYL ALCOHOL
Teva Pharmaceuticals USA, Inc.	sildenafil	0093-5341	TALC

What are the Most Frequently-Used Excipients in SILDENAFIL?

# Of NDCs	Excipient
10	ANHYDROUS CITRIC ACID
81	ANHYDROUS DIBASIC CALCIUM PHOSPHATE
22	CALCIUM PHOSPHATE, DIBASIC, ANHYDROUS
11	CALCIUM PHOSPHATE, DIBASIC, DIHYDRATE
7	CALCIUM PHOSPHATE, MONOBASIC, ANHYDROUS
138	CELLULOSE, MICROCRYSTALLINE
134	CROSCARMELLOSE SODIUM

Excipient Strategy and Commercial Opportunities for SILDENAFIL

Last updated: February 28, 2026

What Is the Role of Excipients in SILDENAFIL Formulations?

Excipients in sildenafil formulations serve critical functions: they stabilize the active pharmaceutical ingredient (API), improve bioavailability, modify release profiles, and enhance patient compliance. The common excipients in sildenafil tablets include microcrystalline cellulose, sodium starch glycolate, magnesium stearate, and coatings such as hypromellose. These excipients influence manufacturing processes and drug performance.

How Do Excipient Choices Impact Sildenafil’s Formulation and Marketability?

Excipient selection affects bioavailability, shelf-life, manufacturing costs, and patient tolerability. For sildenafil tablets, excipients that improve solubility or aid in taste masking increase product appeal. Innovative excipients like superdisintegrants or bioadhesive polymers can enable novel formulations such as fast-dissolving or sustained-release tablets, expanding therapeutic options and market segments.

What Are the Commercial Opportunities for Excipient Innovation in Sildenafil?

1. Enhanced Bioavailability: Developing excipients that improve solubility (e.g., lipid-based carriers) could enable lower doses, reducing side effects and manufacturing costs.

2. Patient-Centric Formulation: Fast-dissolving or orally disintegrating tablets driven by innovative superdisintegrants improve user experience, especially for populations with swallowing difficulties.

3. Extended-Release Formulations: Excipients enabling sustained drug release can improve adherence, particularly in chronic settings, expanding market share.

4. Regulatory Distinctions: Proprietary excipients or novel formulations may facilitate patent protection and market differentiation, creating premium pricing opportunities.

What Are the Key Excipients and Technologies for Sildenafil Formulation Development?

Excipients	Function	Key Technology	Market Implication
Microcrystalline cellulose	Binder/filler	Direct compression	Widely used; cost-effective
Superdisintegrants (crospovidone, croscarmellose)	Disintegration	Fast-dissolving tablets	Growing demand for convenience products
Hypromellose	Coating, controlled release	Multiparticulate systems	Differentiates products; patent potential
Lipids	Solubility enhancement	Liposomal or self-emulsifying drug delivery systems	Enables lower dosing; improves absorption

How Does Regulatory Environment Influence Excipient Strategy?

Regulations require excipients to be Generally Recognized As Safe (GRAS) or approved for specific routes. Switching to novel excipients entails extensive safety studies and regulatory submission. Patent exclusivity can be gained through formulation innovations that use proprietary excipients or methods.

What Are the Competitive Dynamics in Sildenafil Excipient Market?

Leading excipient manufacturers such as Dupont, BASF, and Ashland offer a range of standard and specialized excipients. Competition drives continuous innovation, with a focus on improved bioavailability, taste, and convenience. Smaller niche excipient providers offer customized solutions targeting specific formulations like rapidly disintegrating tablets.

What Are Future Trends and Opportunities?

• Development of bioavailability enhancers tailored for sildenafil.
• Use of smart excipients that respond to physiological triggers.
• Incorporation of natural or plant-based excipients to meet demand for "clean label" products.
• Integration of nanotechnology for targeted or enhanced delivery.

Key Takeaways

• Excipients critically influence sildenafil formulation performance and patient compliance.
• Innovation in excipient technology offers avenues for product differentiation and premium pricing.
• Formulation advances focus on bioavailability, convenience, and extended release.
• Regulatory pathways govern the adoption of novel excipients, impacting development timelines.
• Competitive dynamics favor firms investing in tailored excipient research and development.

FAQs

1. How does excipient selection influence sildenafil bioavailability?
   Excipients can enhance solubility and absorption, particularly through lipid-based or self-emulsifying systems, which can allow for lower doses and reduced side effects.

2. What are the regulatory considerations for using novel excipients in sildenafil?
   Novel excipients require safety data, toxicity testing, and approval documentation, which may extend development timelines.

3. Can excipient innovation lead to patent opportunities?
   Yes, proprietary formulations or delivery systems utilizing unique excipients can confer patent protection and market exclusivity.

4. What excipients are common in fast-dissolving sildenafil tablets?
   Superdisintegrants like crospovidone and croscarmellose are typical, aiding rapid disintegration without increased production complexity.

5. What trends are shaping future excipient development for sildenafil?
   Bioavailability enhancement, natural excipients, and smart delivery systems are emerging areas influencing formulation strategies.

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References

[1] Food and Drug Administration. (2020). Guidance for Industry: Excipients in Drug Products. U.S. Department of Health and Human Services.

[2] European Medicines Agency. (2021). Guideline on Excipients in the Dossier for Application for Marketing Authorization of Medicinal Products.

[3] Kucukgül, A. A., et al. (2020). Self-emulsifying drug delivery systems of sildenafil citrate: Formulation development and characterization. Journal of Pharmaceutical Innovation, 15(2), 142-152.

[4] Patel, M. M., et al. (2021). Advances in sildenafil formulation technologies: A comprehensive review. International Journal of Pharmaceutical Sciences, 13(4), 385-399.