extended release

Extended release is about stretching one dose to cover a longer stretch of the day. Where you might otherwise take a pill three times daily, an extended-release version lets you take it once or twice, because the drug keeps coming out over many hours instead of all at once.

Formally, the pharmacopoeias define extended release as a modified-release form that allows at least a twofold reduction in dosing frequency, or some meaningful reduction, compared with the immediate-release product. The release mechanism may be a matrix, a reservoir membrane, or an osmotic pump; what unites them is the prolonged-release profile, not the technology used.

The chief benefit is patient convenience and compliance, plus flatter blood-level swings. The risks mirror those of all modified-release products: the long-lived dose contained in one unit can be released too fast if the tablet is crushed, chewed, or taken with alcohol, leading to dose dumping. For this reason such tablets are usually labelled to be swallowed whole.