Which of the following sets lists formulation strategies used to improve solubility and dissolution rate of poorly soluble drugs?

Which of the following sets lists formulation strategies used to improve solubility and dissolution rate of poorly soluble drugs?

• A. Salt formation, solid dispersions, and particle size reduction
• B. Co-administration with bile salts, salt formation, and packaging
• C. Crystallization, capsuleization, and osmosis
• D. Enteric coating, salt formation, and sustained release

Answer: (A)

Enhancing solubility and dissolution rate for poorly soluble drugs relies on approaches that increase how readily the drug dissolves in the aqueous environment of the GI tract. Salt formation converts the drug into ionic forms, which generally dissolve much more readily in water than the neutral form, boosting both solubility and early dissolution. Solid dispersions mix the poorly soluble drug with a hydrophilic carrier, often creating an amorphous state and improving wettability, which markedly increases dissolution. Reducing particle size raises the surface area available for dissolution, speeding up the process according to the dissolution rate relationship. Together, these strategies directly target solubility and dissolution. Other options include approaches that either don’t directly enhance solubility/dissolution or affect release in other ways. Co-administration with bile salts can aid solubility in some contexts but is not a standard solid-formulation strategy like salt formation, solid dispersions, and particle size reduction. Packaging, crystallization practices, capsuleization, osmosis-based delivery, enteric coating, and sustained release primarily influence release behavior, stability, or dosage form design rather than actively increasing solubility or dissolution rate of poorly soluble drugs.

Enhancing solubility and dissolution rate for poorly soluble drugs relies on approaches that increase how readily the drug dissolves in the aqueous environment of the GI tract. Salt formation converts the drug into ionic forms, which generally dissolve much more readily in water than the neutral form, boosting both solubility and early dissolution. Solid dispersions mix the poorly soluble drug with a hydrophilic carrier, often creating an amorphous state and improving wettability, which markedly increases dissolution. Reducing particle size raises the surface area available for dissolution, speeding up the process according to the dissolution rate relationship. Together, these strategies directly target solubility and dissolution.

Other options include approaches that either don’t directly enhance solubility/dissolution or affect release in other ways. Co-administration with bile salts can aid solubility in some contexts but is not a standard solid-formulation strategy like salt formation, solid dispersions, and particle size reduction. Packaging, crystallization practices, capsuleization, osmosis-based delivery, enteric coating, and sustained release primarily influence release behavior, stability, or dosage form design rather than actively increasing solubility or dissolution rate of poorly soluble drugs.