| abstract |
A carrier base material to be combined with a therapeutically active medicament and formed into a solid, shaped dosage unit having a bimodal controlled release of medicament upon administration. Specifically, this invention relates to a carrier base material consisting of one or more bimodal hydroxypropylmethylcelluloses (B-HPMC's) having a physical and chemical structure which renders it suitable for use sustained release therapeutic formulations with bimodal release characteristics. |