Complex sentence: Hydroxyethyl cellulose and methyl cellulose are frequently used with hydrophobic drugs in capsule formulations to improve it's dissolution in the gastrointestinal fluids, this process is known as "Hydrophilization".
Split into simpler sentences: Hydroxyethyl cellulose and methyl cellulose are frequently used with hydrophobic drugs in capsule formulations, to improve the drugs' dissolution in the gastrointestinal fluids. This process is known as "Hydrophilization".