WO 2018/002637 Al 04 January 2018 (04.01.2018) W !P O PCT
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(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2018/002637 Al 04 January 2018 (04.01.2018) W !P O PCT (51) International Patent Classification: A61K 9/00 (2006.01) A61K 47/44 (2017.01) A61K 9/08 (2006.01) (21) International Application Number: PCT/GB2017/051914 (22) International Filing Date: 29 June 2017 (29.06.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 161 1547.9 0 1 July 2016 (01 .07.2016) GB (71) Applicant: GW RESEARCH LIMITED [GB/GB]; Sov ereign House, Vision Park, Chivers Way, Histon, Cam bridge Cambridgeshire CB24 9BZ (GB). (72) Inventor: SHAH, Harshit; Sovereign House, Vision Park, Chivers Way, Histon, Cambridge Cambridgeshire CB24 9BZ (GB). (74) Agent: HGF LIMITED; 4th Floor, Merchant Exchange, 17-19 Whitworth Street West, Manchester Greater Man chester M l 5WG (GB). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: — of inventorship (Rule 4.1 7(iv)) Published: — with international search report (Art. 2 (3)) o o 00 (54) Title: ORAL CANNABINOID FORMULATIONS © (57) Abstract: The present invention relates to a cannabinoid containing oral solution. Preferably the oral solution comprises a cannabi- noid, a lipid solvent, a sweetener and ethanol, characterised in that the sweetener is an ultrahigh potency sweetener. ORAL CANNABINOID FORMULATIONS [0001] The present invention relates to a cannabinoid containing oral solution. BACKGROUND TO THE INVENTION [0002] The use of cannabinoids in medicine has necessitated finding more effective ways of drug delivery. This is in part due to factors such as, poor aqueous solubility, limited bioavailability, and cannabinoid instability, but the use of cannabinoids at relatively high doses (in daily amounts of up to 2000mg) and / or in challenging patient groups, e.g. young children, and / or for particular indications, can create additional challenges. [0003] There are currently three commercially available cannabinoid formulations on the market. [0004] Dronabinol (Marinol®) is a synthetic tetrahydrocannabinol (THC) which is delivered orally, in sesame oil as capsules. [0005] Nabilone (Cesamet®) is a synthetic cannabinoid and an analog of THC and is delivered orally in capsules with povidone and corn starch. [0006] Nabiximols (Sativex®) is a natural extract of cannabinoids containing defined amounts of THC and Cannabidiol (CBD) and is delivered as a liquid, by way of an oromucosal spray. [0007] The applicant also provides an oral solution containing CBD (Epidiolex®) on a named patient basis. The CBD is formulated in sesame seed oil and further comprises the sweetener sucralose (600x the sweetness intensity of sucrose), strawberry flavouring and up to 10% v/v ethanol. [0008] Whilst there is no clear FDA guidance for maximum allowable ethanol concentration in prescription medicines, an article (Ethanol in Liquid Preparations Intended for Children, Paediatrics: Official Journal of The American Academy of Paediatrics, 1984: 73:405), recommends that a Blood Alcohol Concentration (BAC) of 0.25 g/L (250 mg/L) should not be exceeded following a single dose of alcohol containing medications. [0009] WO 2015/184127 (Insys) discloses a number of different oral formulations including: an alcohol free formulation in which the cannabinoid is formulated in a mix of polyethylene glycol and propylene glycol, optionally with water, a formulation containing alcohol and a formulation containing lipids. In each of the formulations disclosed, the cannabinoid is a synthetically produced (as opposed to a naturally extracted) cannabidiol. [0010] The specification teaches the inclusion of a number of pharmaceutically acceptable excipients such as, anti-oxidants, sweeteners, enhancers, preservatives, flavouring agents and pH modifiers. [001 1] According to European Medicine Agency draft guideline (EMA/CHMP/507988/2013), for 2 to 6 years old children, a theoretical limit for Blood Alcohol Concentration (BAC) following single administration of a formulation containing alcohol is not more than 0.01 g/L (10mg/L) and ethanol intake should be not more than 6 mg/kg/day. [0012] For paediatric products aimed at younger children, it is desirable to have low or no ethanol formulations, preferably dispensed as syrup, as younger children find it difficult to swallow capsules. They also favour sweet, flavoured products, particularly where the taste of cannabinoid requires masking. [0013] A problem with the use of pharmaceutically acceptable sweeteners, and flavouring agents is that they are generally polar in nature, and thus unlike the cannabinoids which are highly lipophilic, they require a polar solvent to dissolve them. [0014] An object of the present invention was to develop a lipid based oral formulation which contained less than 0% (v/v) ethanol, which was palatable, and could be delivered to young children as syrup, in relatively small volumes, typically less than 10 ml. BRIEF SUMMARY OF THE DISCLOSURE [0015] In accordance with a first aspect of the present invention there is provided a cannabinoid containing oral solution comprising: a cannabinoid, a lipid solvent, a sweetener and ethanol, characterised in that the sweetener is an ultrahigh potency sweetener. [0016] An ultrahigh potency sweetener is defined herein as a sweetener with a sweetness intensity compared to sucrose of greater than 750. [0017] Preferably the ultrahigh potency sweetener has a sweetness intensity compared to sucrose of greater than 1000, more preferably greater than 5000. [0018] In one embodiment of the invention the ultrahigh potency sweetener is (N-[N-(3,3- dimethylbutyl)-L-a-aspartyl]-L-phenylalanine 1-methyl ester) (Neotame). [0019] In a further embodiment the ultrahigh potency sweetener is N-[N-3-(3-hydroxy-4- methoxyphenyl)propyl-a-L-aspartyl]-L-phenylalanine 1-methyl ester) (Advantame). [0020] Preferably the cannabinoid containing oral solution further comprises a flavourant. [0021] Preferably the cannabinoid is selected from: cannabichromene (CBC), cannabichromenic acid (CBCV), cannabidiol (CBD), cannabidiolic acid (CBDA), cannabidivarin (CBDV), cannabigerol (CBG), cannabigerol propyl variant (CBGV), cannabicyclol (CBL), cannabinol (CBN), cannabinol propyl variant (CBNV), cannabitriol (CBO), tetrahydrocannabinol (THC), tetrahydrocannabinolic acid (THCA), tetrahydrocannabivarin (THCV) and tetrahydrocannabivarinic acid (THCVA). More preferably the cannabinoid is CBD. [0022] It is preferred that the cannabinoid containing oral solution has a cannabinoid present in an amount of from 5 to 40% (w/v), ethanol present in an amount of less than 2% (w/v), ultrahigh potency sweetener present in less than 0.05% (w/v) flavourant, more preferably still less than 0.01% (w/v) flavourant present in an amount of less 0.2% (w/v) and lipid solvent present q.s. to 100%. [0023] More preferably the cannabinoid is CBD, the ultrahigh potency sweetener is Neotame, the flavourant is strawberry flavour and the lipid solvent is sesame oil. [0024] Preferably the cannabinoid containing oral solution is stable in climatic zones I and II for up to 24 months at 25°C or is stable in climatic zones III and IV for up to 18 months at 30°C. [0025] Surprisingly, the formulations of the invention were stable without the need for the incorporation of stability enhancers such as anti-oxidants or complexing agents. [0026] Preferably the cannabinoid containing oral solution is absent of a stabilizing agent. [0027] More preferably the stabilizing agent which the cannabinoid containing oral solution is absent of is an antioxidant or a chelating agent. [0028] The formulation may be packaged for use in a bottle, oral or enteral syringe, metered dose device or other container used to store or administer liquid oral medications. [0029] In accordance with a second aspect of the present invention there is provided a method of treating a subject comprising administering a cannabinoid containing oral solution. [0030] Preferably the subject is a human. [0031] Preferably the cannabinoid containing oral solution is for use in the treatment of epilepsy and syndromes associated therewith, Dravet Syndrome, Lennox Gastaut Syndrome, myocolonic seizures, juvenile mycolonic epilepsy, refractory epilepsy, schizophrenia, juvenile spasms, West syndrome, infantile spasms, refractory infantile spasms, tuberous sclerosis complex, brain tumors, neuropathic pain, cannabis