| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
| Hovedpine af spændingstype | 
 
 
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| MedDRA Classification | 
| E.1.3 | Condition being studied is a rare disease  |  No  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
| At vurderer den profylaktiske effekt af memantin ved behandling af patienter med kronisk hovedpine af spændingstype. | 
 
 
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| E.2.2 | Secondary objectives of the trial  |  | 
| E.2.3 | Trial contains a sub-study  |  Information not present in EudraCT  | 
| E.3 | Principal inclusion criteria  | 
Alder mellem 18 og 65 år. Kronisk hovedpine (hovedpine >180 dage/år) af spændingstype, opfyldende IHS kriterierne[14]. Diagnosen stilles efter at patienten har udfyldt hovedpinedagbog [15] i 4 uger. Forebyggende medicin mod kronisk spændingshovedpine og migræne skal standses før run-in perioden. Signeret, informeret samtykkeerklæring skal foreligge. 
 
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| E.4 | Principal exclusion criteria | 
Migræne mere end 1 anfald per måned i gennemsnit gennem det sidste år. - 	Patienter med cerebrovaskulære eller andre CNS-sygdomme, inkl. demens. - 	Patienter med betydende somatiske og psykiatriske sygdomme. - 	Patienter med tidligere myokardieinfarkt, kardielle ledningsforstyrrelser, hjerteinsufficiens eller iskæmisk hjertesygdom. - 	Patienter med epilepsi eller anden krampelidelse. - 	Patienter med hypo- eller hypertension som ikke er velbehandlet. -	Patienter med nedsat nyre eller leverfunktion. - 	Depression (>17 point på Hamilton Depression Scale [16]). - 	Patienter med overforbrug eller afhængighed af morfika eller med et forbrug af svage analgetika eller NSAID’s svarende til 15 dage/måned eller mere (ICHD-II kriterier). - 	Patienter med misbrug af alkohol. -	Fertile kvinder som ikke benytter adækvat antikonception (IUD, p-piller, depotprævention).  - 	Gravide og ammende kvinder.  - 	Patienter med overfølsomhed overfor memantin. - 	Patienter med daglig brug af medicin (ekskl. prævention og hormonel substitution eller anden medicin som ikke forventes at influere på hovedpinen – evt. behandling skal fortsætte uændret gennem hele studiet) - 	Tidligere behandling med undersøgelsesmedicinen. 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
-	Areal under hovedpine kurven (intensitet x varighed) (AUC) [18] i de sidste 4 uger under aktiv behandling sammenlignet med AUC i de sidste 4 uger under placebobehandling 	AUC er den bedste måde at beskrive at beskrive hovedpine på. 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  Yes  | 
| E.6.3 | Therapy |  No  | 
| E.6.4 | Safety |  No  | 
| E.6.5 | Efficacy |  No  | 
| E.6.6 | Pharmacokinetic |  No  | 
| E.6.7 | Pharmacodynamic |  No  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  Information not present in EudraCT  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  No  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  Yes  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  No  | 
| E.7.4 | Therapeutic use (Phase IV) |  No  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  Yes  | 
| E.8.1.1 | Randomised |  Yes  | 
| E.8.1.2 | Open |  No  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  Yes  | 
| E.8.1.5 | Parallel group |  No  | 
| E.8.1.6 | Cross over  |  Yes  | 
| E.8.1.7 | Other |  No  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  No  | 
| E.8.2.2 | Placebo  |  Yes  | 
| E.8.2.3 | Other |  No  | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  Yes  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  No  | 
| E.8.5 | The trial involves multiple Member States |  No  | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  No  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  Information not present in EudraCT  | 
| E.8.7 | Trial has a data monitoring committee |  Information not present in EudraCT  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
                     | 
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 1 | 
| E.8.9.1 | In the Member State concerned months | 0 | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 1 | 
| E.8.9.2 | In all countries concerned by the trial months | 0 |