Wo 2009/078034 A2
Total Page:16
File Type:pdf, Size:1020Kb
(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date PCT (10) International Publication Number 25 June 2009 (25.06.2009) WO 2009/078034 A2 (51) International Patent Classification: Building, Goregaon - Mulund Link Road,, Opposite Indira A61K9/00 (2006.01) A61K9/20 (2006.01) Container Yard, Off L.B.S. Marg, Bhandup (W),, Mumbai A61K 9/14 (2006.01) A61K 31/4045 (2006.01) 400 078 (IN). KELKAR, Atul [IN/IN]; 221, Annexe A61K 9/16 (2006.01) Building, Goregaon - Mulund Link Road,, Opposite Indira Container Yard, Off L.B.S. Marg, Bhandup (W),, Mumbai (21) International Application Number: 400 078 (IN). PCT/IN2008/000787 (74) Agent: MAJUMDAR, Subhatosh; S. MAJUMDAR & (22) International Filing Date: CO., 5, Harish Mukherjee Road, Kolkata 700 025 (IN). 26 November 2008 (26.1 1.2008) (81) Designated States (unless otherwise indicated, for every (25) Filing Language: English kind of national protection available): AE, AG, AL, AM, AO, AT,AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, (26) Publication Language: English CH, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, (30) Priority Data: IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, 2320/MUM/2007 LR, LS, LT, LU, LY,MA, MD, ME, MG, MK, MN, MW, 26 November 2007 (26. 11.2007) IN MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY,TJ, (71) Applicant (for all designated States except US): RUBI¬ TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, CON RESEARCH PRIVATE LIMITED [IN/IN]; 221, ZW Annexe Building, Goregaon - Mulund Link Road,, Oppo site Indira Container Yard, Off L.B.S. Marg, Bhandup (W),, (84) Designated States (unless otherwise indicated, for every Mumbai 400 078 (IN). kind of regional protection available): ARIPO (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, (72) Inventors; and ZW), Eurasian (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), (75) Inventors/Applicants (for US only): PILGAONKAR, European (AT,BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, Pratibha, S. [IN/IN]; 221, Annexe Building, Goregaon - FR, GB, GR, HR, HU, IE, IS, IT, LT,LU, LV,MC, MT, NL, Mulund Link Road,, Opposite Indira Container Yard, Off NO, PL, PT, RO, SE, SI, SK, TR), OAPI (BF, BJ, CF, CG, L.B.S. Marg, Bhandup (W),, Mumbai 400 078 (IN). RUS- CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). TOMJEE, Maharukh, T. [IN/IN]; 221, Annexe Building, Goregaon - Mulund Link Road,, Opposite Indira Container Published: Yard, Off L.B.S. Marg, Bhandup (W),, Mumbai 400 078 — without international search report and to be republished (IN). GANDHI, Anilkumar, S. [IN/IN]; 221, Annexe upon receipt of that report (54) Title: ORAL DISINTEGRATING TABLETS OF ROPINIROLE HYDROCHLORIDE (57) Abstract: The present invention relates to a solid pharmaceutical composition comprising ropinirole, which dissolves or dis- integrates in the oral cavity within about sixty (60) seconds. The present invention further discloses orally disintegrating tablets of ropinirole of optimal mechanical strength comprising taste-masked ropinirole and at least one pharmaceutically acceptable excipient. ORAL DISINTEGRATING TABLETS OF ROPINIROLE HYDROCHLORIDE Field of the invention The present invention relates to a solid pharmaceutical composition comprising ropinirole, which dissolves or disintegrates in the oral cavity within about sixty (60) seconds. The present invention also relates to a process for the preparation of a taste-masked pharmaceutical composition of ropinirole of optimal mechanical strength comprising ropinirole along with a taste-masking agent and at least one pharmaceutically acceptable excipient. Background of the Invention The geriatric population, composed of people aged sixty-five (65) years and over, is rapidly growing in the United States and throughout the world. According to the United Nations World Prospects published in 2005, the global population of people over the age of sixty (60) in 2005 was estimated to be 672 million out of a total of approximately 6.5 billion and is expected to reach 1.9 billion by 2050 (cited in: Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat. The World Population Prospects: the 2004 revision). This population presents unique treatment challenges for caregivers and physicians. The prevalence of psychiatric illness ranges from 65-90%, with dementia complicated by depression, psychosis, and behavioral disturbances, the most common disorder. Majority of them also suffer from movement disorders, which are neurological conditions that affect the speed, fluency, quality, and ease of movement. Abnormal fluency or speed of movement (dyskinesia) may involve excessive or involuntary movement (hyperkinesia) or slowed or absent voluntary movement (hypokinesia). Non- limiting examples of movement disorders include ataxia (lack of coordination, often producing jerky movements), dystonia (causes involuntary movement and prolonged muscle contraction), Huntington's disease (chronic progressive chorea), multiple system atrophies (e.g., Shy-Drager syndrome), myoclonus (rapid, brief, irregular movement), Parkinson's disease, progressive supranuclear palsy (rare disorder that affects purposeful movement), Restless leg syndrome (RSD) and periodic limb movement disorder (PLMD), tics (involuntary muscle contractions), Tourette's syndrome, Tremor (e.g., essential tremor, resting tremor), Wilson disease (inherited disorder that causes neurological and psychiatric symptoms and liver disease). These excessive or otherwise abnormal involuntary movements may vary significantly in rate, frequency, periodicity and progression character. Parkinson's disease is a progressive disorder of the nervous system that affects about 10 million people world-wide and is of increasing occurrence in aging populations. It is a highly specific degeneration of dopamine-containing cells of the substantia nigra of the midbrain causing a dopamine deficiency in the striatum. It affects neurons in the part of the brain that controls muscle movement and causes symptoms such as trembling, muscle rigidity, difficulty in walking, and problems with balance and coordination. Further, Restless Leg Syndrome (RLS), also known as Ekbom's Syndrome a fairly common sensorimotor disorder, characterized in that it typically gives the individual who suffers from RLS an unpleasant sensation in the legs at rest, causing what is often described as an irresistible desire to move, leading to significant discomfort. Movement disorders like restless leg syndrome and periodic limb movement during sleep are common in patients with fibromyalgia and chronic fatigue syndrome. Fibromyalgia is a chronic pain disorder characterized by widespread musculoskeletal aches, pain and stiffness, soft tissue tenderness, general fatigue, and sleep disturbances. Fibromyalgia patients experience a range of symptoms of varying intensities that wax and wane over time. Chronic fatigue syndrome is a disorder that causes extreme fatigue that lasts longer with symptoms that include widespread muscle and joint pain, cognitive difficulties, chronic, often severe mental and physical exhaustion. Such type of movement disorders and impairments further complicate the administration of medication to the elderly population. Most commonly employed solid pharmaceutical preparations such as tablets or capsules are not suitable for this population as they may have difficulty in swallowing them. With liquid dosage forms, administration and stability of the drug and the dosage form can be a major concern. An ideal solid dosage form for these patients includes a formulation that simply melts in the mouth without any extra effort. Further, taste is an important parameter governing the compliance of patients of any age group. With unpleasant tasting drugs, the disagreeable taste of the drug can lead to low patient compliance. Such reduced compliance, especially in case of Parkinson's patients can lead to severe complications. Hence there exists a need to design taste-masked solid dosage forms of unpleasant tasting drugs for patients suffering from Parkinson's disease that dissolves or disintegrates in the oral cavity without the need for water providing a more convenient dosage form encouraging adherence to the daily medication regimen. Ropinirole, 4-[2-(dipropylamino)ethyl]-l,3-dihydro-2H-indol 2-one, used commonly as hydrochloride salt, is a selective non-ergoline dopamine agonist used mainly in the treatment of Parkinson's disease. Dopamine agonists function by increasing the dopamine levels in the brain. This helps to lessen the symptoms of Parkinson's disease. Ropinirole has also been disclosed as being of potential use in the treatment of a variety of other conditions, such as fibromyalgia (U.S. Patent No. 6,277,875), and chronic fatigue syndrome (U.S. Patent No. 6,300,365). Ropinirole is rapidly absorbed after oral administration, reaching peak concentration in approximately 1-2 hours. Treatment with ropinirole is- also desirable in pediatric patients suffering from Restless Leg Syndrome (RLS) and Attention Deficit Hyperactivity Disorder (ADHD), and study shows that it resulted in significant improvement (Reference: Ropinirole in a Child With Attention- Deficit Hyperactivity Disorder and Restless Legs Syndrome. Pediatric Neurology, Volume 32, Issue 5, Pages 350-351 E. Konofal, I. Arnulf, M. Lecendreux, M. Mouren). Such pediatric