Aggregation of antidepressant drugs in aqueous solution

Area of Science:

• Physical Chemistry
• Pharmaceutical Sciences
• Medicinal Chemistry

Background:

• Antidepressant drugs are widely prescribed medications.
• Understanding their behavior in aqueous solutions is crucial for formulation and efficacy.
• Aggregation properties can influence drug solubility, stability, and delivery.

Purpose of the Study:

• To investigate the aggregation behavior of various antidepressant drugs in aqueous solutions.
• To determine if antidepressant hydrochlorides form self-assembled structures like micelles.
• To report critical micelle concentrations and associated properties.

Main Methods:

• Utilized light scattering, conductivity, and pH measurements.
• Examined a series of antidepressant drug hydrochlorides.
• Determined aggregation patterns and critical micelle concentrations.

Main Results:

• Most investigated antidepressant hydrochlorides exhibited micellar aggregation in aqueous solution.
• Dibenzepin, mianserin, and maprotiline hydrochlorides showed no significant association up to their solubility limits.
• Critical micelle concentrations (CMCs) and micellar properties were determined for the aggregating compounds.

Conclusions:

• The majority of tested antidepressant drugs self-assemble into micelles in aqueous environments.
• Specific drugs like dibenzepin, mianserin, and maprotiline do not form micelles under the tested conditions.
• These findings provide insights into the physicochemical properties of antidepressants relevant to their pharmaceutical applications.