Minoxidil, classified as BCS Class I, is a highly soluble and highly permeable drug. When administered orally, rapid disintegration and dissolution within the gastrointestinal tract cause a sharp rise in blood concentration, potentially triggering exc...
Minoxidil, classified as BCS Class I, is a highly soluble and highly permeable drug. When administered orally, rapid disintegration and dissolution within the gastrointestinal tract cause a sharp rise in blood concentration, potentially triggering excessive autonomic nervous system activation. This can lead to serious systemic side effects such as reflex tachycardia, fluid retention, edema, and headaches. It also exhibits poor photostability.
Therefore, to ensure a stable dissolution profile and quality using a delayed-onset, immediate-release system that suppresses excessive drug release in the initial 2 minute interval and achieves complete dissolution within 5 minutes, the ratios of functional excipients such as microcrystalline cellulose, pregelatinized starch, hydroxypropyl cellulose, and silicon dioxide was optimized. This controlled the disintegration mechanism within the tablet, ensured drug uniformity through a partial post mixing process for excipients, and improved the light stability of the minoxidil tablet by incorporating a film coating using a water soluble polymer.
This provided an initial physical delay time during administration and hardness and abrasion resistance evaluations on the manufactured tablets. The results confirmed that the tablets achieve complete dissolution at the 5 minute point while suppressing the initial 2 minute dissolution rate, confirming their potential as a fast release tablet precisely controlling the initial release of a BCS Class I drug.