A biodegradable, multi-layered controlled release gastroretentive baclofen or R-baclofen dosage form which is optionally divided into a first dosage of baclofen or R-baclofen for immediate release and a second dosage of baclofen or R-baclofen for controlled release in the stomach and gastrointestinal tract of a patient, folded into a capsule which disintegrates upon contact with gastric juice and the dosage form unfolds rapidly upon contact with gastric juice. The biodegradable, multi-layered gastroretentive dosage forms of the invention provide fast onset of baclofen or R-baclofen activity with prolonged absorption and minimal undesirable side effects.任意で患者の胃及び胃腸管での制御放出のための第１の投与量のザレプロンと、即時放出のための第２の投与量のザレプロンとに分割された、生分解性の多層制御放出胃内滞留性剤形は、胃液に接触すると崩壊するカプセル内に折り畳まれ、胃内滞留性剤形は胃液と接触すると迅速に解かれる。本発明の生分解性の多層ザレプロン胃内滞留性剤形が良好な睡眠維持及び最小限の翌日に残留する効果を伴う効率的な睡眠導入を与える。
