Publications 2020

Johannessen Landmark C, Johannessen SI, Patsalos PN (2020)
Therapeutic drug monitoring of antiepileptic drugs: current status and future prospects
Expert Opin Drug Metab Toxicol, 16 (3), 227-238
DOI 10.1080/17425255.2020.1724956, PubMed 32054370

Landmark CJ, Heger K, Lund C, Burns ML, Bjørnvold M, Sætre E, Johannessen SI (2020)
Pharmacokinetic variability during long-term therapeutic drug monitoring of valproate, clobazam, and levetiracetam in patients with Dravet syndrome
Ther Drug Monit (in press)
DOI 10.1097/FTD.0000000000000781, PubMed 32558674

Svendsen T, Brodtkorb E, Baftiu A, Lossius MI, Nakken KO, Johannessen SI, Johannessen Landmark C (2020)
Clinical experience combined with therapeutic drug monitoring of lacosamide
Acta Neurol Scand, 141 (4), 279-286
DOI 10.1111/ane.13206, PubMed 31853958

Publications 2019

Baftiu A, Lima MH, Svendsen K, Larsson PG, Johannessen SI, Landmark CJ (2019)
Safety aspects of antiepileptic drugs-a population-based study of adverse effects relative to changes in utilisation
Eur J Clin Pharmacol, 75 (8), 1153-1160
DOI 10.1007/s00228-019-02678-1, PubMed 31001654

Bialer M, Johannessen SI, Koepp MJ, Levy RH, Perucca E, Tomson T, White HS (2019)
A summary of data presented at the XIV conference on new antiepileptic drug and devices (EILAT XIV)
Epilepsy Res, 153, 66-67
DOI 10.1016/j.eplepsyres.2019.03.002, PubMed 30910314

Johannessen Landmark C, Fløgstad I, Baftiu A, Syvertsen M, Enger U, Koht J, Johannessen SI (2019)
Long-term follow-up with therapeutic drug monitoring of antiepileptic drugs in patients with juvenile myoclonic epilepsy
Epilepsy Res, 155, 106148
DOI 10.1016/j.eplepsyres.2019.05.016, PubMed 31195184

Johannessen Landmark C, Fløgstad I, Syvertsen M, Baftiu A, Enger U, Koht J, Johannessen SI (2019)
Treatment and challenges with antiepileptic drugs in patients with juvenile myoclonic epilepsy
Epilepsy Behav, 98 (Pt A), 110-116
DOI 10.1016/j.yebeh.2019.05.021, PubMed 31330379

Larsen Burns M, Kinge E, Stokke Opdal M, Johannessen SI, Johannessen Landmark C (2019)
Therapeutic drug monitoring of gabapentin in various indications
Acta Neurol Scand, 139 (5), 446-454
DOI 10.1111/ane.13075, PubMed 30710348

Larsen Burns M, Nikanorova M, Baftiu A, Borg Rasmussen J, Johannessen SI, Johannessen Landmark C (2019)
Pharmacokinetic Variability and Clinical Use of Lacosamide in Children and Adolescents in Denmark and Norway
Ther Drug Monit, 41 (3), 340-347
DOI 10.1097/FTD.0000000000000599, PubMed 30688870

Publications 2018

Bialer M, Johannessen SI, Koepp MJ, Levy RH, Perucca E, Tomson T, White HS (2018)
Progress report on new antiepileptic drugs: A summary of the Fourteenth Eilat Conference on New Antiepileptic Drugs and Devices (EILAT XIV). II. Drugs in more advanced clinical development
Epilepsia, 59 (10), 1842-1866
DOI 10.1111/epi.14555, PubMed 30368788

Bialer M, Johannessen SI, Koepp MJ, Levy RH, Perucca E, Tomson T, White HS (2018)
Progress report on new antiepileptic drugs: A summary of the Fourteenth Eilat Conference on New Antiepileptic Drugs and Devices (EILAT XIV). I. Drugs in preclinical and early clinical development
Epilepsia, 59 (10), 1811-1841
DOI 10.1111/epi.14557, PubMed 30368792

Johannessen Landmark C, Farmen AH, Burns ML, Baftiu A, Lossius MI, Johannessen SI, Tomson T (2018)
Pharmacokinetic variability of valproate during pregnancy - Implications for the use of therapeutic drug monitoring
Epilepsy Res, 141, 31-37
DOI 10.1016/j.eplepsyres.2018.02.004, PubMed 29453075

Reimers A, Berg JA, Burns ML, Brodtkorb E, Johannessen SI, Johannessen Landmark C (2018)
Reference ranges for antiepileptic drugs revisited: a practical approach to establish national guidelines
Drug Des Devel Ther, 12, 271-280
DOI 10.2147/DDDT.S154388, PubMed 29467570

Publications 2017

Baftiu A, Feet SA, Larsson PG, Burns ML, Henning O, Sætre E, Molden E, Granas AG, Johannessen SI, Landmark CJ (2017)
Utilisation and polypharmacy aspects of antiepileptic drugs in elderly versus younger patients with epilepsy: A pharmacoepidemiological study of CNS-active drugs in Norway, 2004-2015
Epilepsy Res, 139, 35-42
DOI 10.1016/j.eplepsyres.2017.11.001, PubMed 29175562

Baftiu A, Landmark CJ, Rusten IR, Feet SA, Johannessen SI, Larsson PG (2017)
Erratum to: Changes in utilisation of antiepileptic drugs in epilepsy and non-epilepsy disorders-A pharmacoepidemiological study and clinical implications
Eur J Clin Pharmacol, 73 (6), 791-792
DOI 10.1007/s00228-017-2252-0, PubMed 28389679

Bialer M, Johannessen SI, Levy RH, Perucca E, Tomson T, White HS (2017)
Progress report on new antiepileptic drugs: A summary of the Thirteenth Eilat Conference on New Antiepileptic Drugs and Devices (EILAT XIII)
Epilepsia, 58 (2), 181-221
DOI 10.1111/epi.13634, PubMed 28111749

Bialer M, Johannessen SI, Levy RH, Perucca E, Tomson T, White HS, Koepp MJ (2017)
Seizure detection and neuromodulation: A summary of data presented at the XIII conference on new antiepileptic drug and devices (EILAT XIII)
Epilepsy Res, 130, 27-36
DOI 10.1016/j.eplepsyres.2017.01.004, PubMed 28113141

Johannessen Landmark C, Burns ML, Baftiu A, Farmen AH, Lossius MI, Johannessen SI, Tomson T (2017)
Pharmacokinetic variability of valproate in women of childbearing age
Epilepsia, 58 (10), e142-e146
DOI 10.1111/epi.13872, PubMed 28833045

Pisani LR, Nikanorova M, Landmark CJ, Johannessen SI, Pisani F (2017)
Specific Patient Features Affect Antiepileptic Drug Therapy Decisions: Focus on Gender, Age, and Psychiatric Comorbidities
Curr Pharm Des, 23 (37), 5639-5648
DOI 10.2174/1381612823666170926103631, PubMed 28950817

Svendsen T, Brodtkorb E, Baftiu A, Burns ML, Johannessen SI, Johannessen Landmark C (2017)
Therapeutic Drug Monitoring of Lacosamide in Norway: Focus on Pharmacokinetic Variability, Efficacy and Tolerability
Neurochem Res, 42 (7), 2077-2083
DOI 10.1007/s11064-017-2234-8, PubMed 28349359

Publications 2016

Baftiu A, Johannessen Landmark C, Rusten IR, Feet SA, Johannessen SI, Larsson PG (2016)
Changes in utilisation of antiepileptic drugs in epilepsy and non-epilepsy disorders-a pharmacoepidemiological study and clinical implications
Eur J Clin Pharmacol, 72 (10), 1245-1254
DOI 10.1007/s00228-016-2092-3, PubMed 27411937

Burns ML, Baftiu A, Opdal MS, Johannessen SI, Landmark CJ (2016)
Therapeutic Drug Monitoring of Clobazam and Its Metabolite-Impact of Age and Comedication on Pharmacokinetic Variability
Ther Drug Monit, 38 (3), 350-7
DOI 10.1097/FTD.0000000000000272, PubMed 26751267

Johannessen Landmark C, Henning O, Johannessen SI (2016)
Proconvulsant effects of antidepressants - What is the current evidence?
Epilepsy Behav, 61, 287-291
DOI 10.1016/j.yebeh.2016.01.029, PubMed 26926001

Johannessen Landmark C, Svendsen T, Dinarevic J, Kufaas RF, Reimers A, Brodtkorb E, Baftiu A, Burns ML, Johannessen SI (2016)
The Impact of Pharmacokinetic Interactions With Eslicarbazepine Acetate Versus Oxcarbazepine and Carbamazepine in Clinical Practice
Ther Drug Monit, 38 (4), 499-505
DOI 10.1097/FTD.0000000000000306, PubMed 27414974

Landmark CJ, Johannessen SI, Tomson T (2016)
Dosing strategies for antiepileptic drugs: from a standard dose for all to individualised treatment by implementation of therapeutic drug monitoring
Epileptic Disord, 18 (4), 367-383
DOI 10.1684/epd.2016.0880, PubMed 27965183

Mevaag M, Henning O, Baftiu A, Granas AG, Johannessen SI, Nakken KO, Johannessen Landmark C (2016)
Discrepancies between physicians' prescriptions and patients' use of antiepileptic drugs
Acta Neurol Scand, 135 (1), 80-87
DOI 10.1111/ane.12578, PubMed 26923477

Svendsen T, Brodtkorb E, Reimers A, Molden E, Sætre E, Johannessen SI, Johannessen Landmark C (2016)
Pharmacokinetic variability, efficacy and tolerability of eslicarbazepine acetate-A national approach to the evaluation of therapeutic drug monitoring data and clinical outcome
Epilepsy Res, 129, 125-131
DOI 10.1016/j.eplepsyres.2016.12.001, PubMed 28043062

Publications 2015

Baftiu A, Johannessen Landmark C, Nikaj V, Neslein IL, Johannessen SI, Perucca E (2015)
Availability of antiepileptic drugs across Europe
Epilepsia, 56 (12), e191-7
DOI 10.1111/epi.13210, PubMed 26477534

Beiske GA, Holmøy T, Beiske AG, Johannessen SI, Johannessen Landmark C (2015)
Antiepileptic and Antidepressive Polypharmacy in Patients with Multiple Sclerosis
Mult Scler Int, 2015, 317859
DOI 10.1155/2015/317859, PubMed 26221541

Bialer M, Johannessen SI, Levy RH, Perucca E, Tomson T, White HS (2015)
Progress report on new antiepileptic drugs: A summary of the Twelfth Eilat Conference (EILAT XII)
Epilepsy Res, 111, 85-141
DOI 10.1016/j.eplepsyres.2015.01.001, PubMed 25769377

Johannessen Landmark C, Beiske G, Baftiu A, Burns ML, Johannessen SI (2015)
Experience from therapeutic drug monitoring and gender aspects of gabapentin and pregabalin in clinical practice
Seizure, 28, 88-91
DOI 10.1016/j.seizure.2015.02.017, PubMed 25758302

Publications 2014

Westergren T, Hjelmeland K, Kristoffersen B, Johannessen SI, Kalikstad B (2014)
Probable topiramate-induced diarrhea in a 2-month-old breast-fed child - A case report
Epilepsy Behav Case Rep, 2, 22-3
DOI 10.1016/j.ebcr.2013.12.006, PubMed 25667861

Publications 2013

Henning O, Baftiu A, Johannessen SI, Landmark CJ (2013)
Withdrawal of antiepileptic drugs during presurgical video-EEG monitoring: an observational study for evaluation of current practice at a referral center for epilepsy
Acta Neurol Scand, 129 (4), 243-51
DOI 10.1111/ane.12179, PubMed 23980664

Karouni M, Henning O, Larsson PG, Johannessen SI, Johannessen Landmark C (2013)
Pharmacological treatment of psychiatric comorbidity in patients with refractory epilepsy
Epilepsy Behav, 29 (1), 77-81
DOI 10.1016/j.yebeh.2013.06.031, PubMed 23939032

Publications 2012

Bialer M, Johannessen SI, Levy RH, Perucca E, Tomson T, White HS (2012)
Progress report on new antiepileptic drugs: a summary of the Eleventh Eilat Conference (EILAT XI)
Epilepsy Res, 103 (1), 2-30
DOI 10.1016/j.eplepsyres.2012.10.001, PubMed 23219031

Johannessen Landmark C, Baftiu A, Tysse I, Valsø B, Larsson PG, Rytter E, Johannessen SI (2012)
Pharmacokinetic variability of four newer antiepileptic drugs, lamotrigine, levetiracetam, oxcarbazepine, and topiramate: a comparison of the impact of age and comedication
Ther Drug Monit, 34 (4), 440-5
DOI 10.1097/FTD.0b013e31825ee389, PubMed 22777154

Publications 2011

Johannessen Landmark C, Johannessen SI, Tomson T (2011)
Host factors affecting antiepileptic drug delivery-pharmacokinetic variability
Adv Drug Deliv Rev, 64 (10), 896-910
DOI 10.1016/j.addr.2011.10.003, PubMed 22063021

Landmark CJ, Fossmark H, Larsson PG, Rytter E, Johannessen SI (2011)
[The prescription registry and abuse of pregabalin]
Tidsskr Nor Laegeforen, 131 (3), 223
DOI 10.4045/tidsskr.10.1328, PubMed 21304565

Landmark CJ, Fossmark H, Larsson PG, Rytter E, Johannessen SI (2011)
Prescription patterns of antiepileptic drugs in patients with epilepsy in a nation-wide population
Epilepsy Res, 95 (1-2), 51-9
DOI 10.1016/j.eplepsyres.2011.02.012, PubMed 21435840

Landmark CJ, Johannessen SI (2011)
Safety aspects of antiepileptic drugs--focus on pharmacovigilance
Pharmacoepidemiol Drug Saf, 21 (1), 11-20
DOI 10.1002/pds.2269, PubMed 22069221

Landmark CJ, Larsson PG, Rytter E, Johannessen SI (2011)
[Clarification about pregabalin and the Norwegian Prescription Database]
Tidsskr Nor Laegeforen, 131 (8), 800-1
DOI 10.4045/tidsskr.11.0292, PubMed 21556068

Publications 2010

Bialer M, Johannessen SI, Levy RH, Perucca E, Tomson T, White HS (2010)
Progress report on new antiepileptic drugs: a summary of the Tenth Eilat Conference (EILAT X)
Epilepsy Res, 92 (2-3), 89-124
DOI 10.1016/j.eplepsyres.2010.09.001, PubMed 20970964

Johannessen SI, Landmark CJ (2010)
Antiepileptic drug interactions - principles and clinical implications
Curr Neuropharmacol, 8 (3), 254-67
DOI 10.2174/157015910792246254, PubMed 21358975

Karouni M, Arulthas S, Larsson PG, Rytter E, Johannessen SI, Landmark CJ (2010)
Psychiatric comorbidity in patients with epilepsy: a population-based study
Eur J Clin Pharmacol, 66 (11), 1151-60
DOI 10.1007/s00228-010-0861-y, PubMed 20669014

Publications 2009

Johannessen Landmark C, Larsson PG, Rytter E, Johannessen SI (2009)
Antiepileptic drugs in epilepsy and other disorders--a population-based study of prescriptions
Epilepsy Res, 87 (1), 31-9
DOI 10.1016/j.eplepsyres.2009.07.005, PubMed 19679449

Rytter E, Landmark CJ, Johannessen SI (2009)
Antiepileptic drug treatment of children at a referral centre for epilepsy--does admission make a difference?
Seizure, 18 (8), 573-9
DOI 10.1016/j.seizure.2009.05.011, PubMed 19576793

Publications 2008

Bialer M, Johannessen SI, Levy RH, Perucca E, Tomson T, White HS (2008)
Progress report on new antiepileptic drugs: a summary of the Ninth Eilat Conference (EILAT IX)
Epilepsy Res, 83 (1), 1-43
DOI 10.1016/j.eplepsyres.2008.09.005, PubMed 19008076

Johannessen Landmark C, Johannessen SI (2008)
Pharmacological management of epilepsy: recent advances and future prospects
Drugs, 68 (14), 1925-39
DOI 10.2165/00003495-200868140-00001, PubMed 18778117

Johannessen SI, Landmark CJ (2008)
Value of therapeutic drug monitoring in epilepsy
Expert Rev Neurother, 8 (6), 929-39
DOI 10.1586/14737175.8.6.929, PubMed 18505358

Landmark CJ, Johannessen SI (2008)
Modifications of antiepileptic drugs for improved tolerability and efficacy
Perspect Medicin Chem, 2, 21-39
PubMed 19787095

Landmark CJ, Johannessen SI (2008)
Pharmacological Management of Epilepsy Recent Advances and Future Prospects
Drugs, 68 (14), 1925-1939

Nakken KO, Johannessen SI (2008)
[Seizure exacerbation caused by antiepileptic drugs]
Tidsskr Nor Laegeforen, 128 (18), 2052-5
PubMed 18846119

Patsalos PN, Berry DJ, Bourgeois BF, Cloyd JC, Glauser TA, Johannessen SI, Leppik IE, Tomson T, Perucca E (2008)
Antiepileptic drugs--best practice guidelines for therapeutic drug monitoring: a position paper by the subcommission on therapeutic drug monitoring, ILAE Commission on Therapeutic Strategies
Epilepsia, 49 (7), 1239-76
DOI 10.1111/j.1528-1167.2008.01561.x, PubMed 18397299

Westin AA, Nakken KO, Johannessen SI, Reimers A, Lillestølen KM, Brodtkorb E (2008)
Serum concentration/dose ratio of topiramate during pregnancy
Epilepsia, 50 (3), 480-5
DOI 10.1111/j.1528-1167.2008.01776.x, PubMed 19178558

Publications 2007

Landmark CJ, Rytter E, Johannessen SI (2007)
Clinical use of antiepileptic drugs at a referral centre for epilepsy
Seizure, 16 (4), 356-64
DOI 10.1016/j.seizure.2007.02.006, PubMed 17420145

Publications 2006

Bialer M, Johannessen SI, Kupferberg HJ, Levy RH, Perucca E, Tomson T (2006)
Progress report on new antiepileptic drugs: a summary of the Eigth Eilat Conference (EILAT VIII)
Epilepsy Res, 73 (1), 1-52
DOI 10.1016/j.eplepsyres.2006.10.008, PubMed 17158031

Johannessen SI, Ben-Menachem E (2006)
Management of focal-onset seizures: an update on drug treatment
Drugs, 66 (13), 1701-25
DOI 10.2165/00003495-200666130-00004, PubMed 16978035

Johannessen SI, Tomson T (2006)
Pharmacokinetic variability of newer antiepileptic drugs: when is monitoring needed?
Clin Pharmacokinet, 45 (11), 1061-75
DOI 10.2165/00003088-200645110-00002, PubMed 17048972

Publications 2005

Johannessen SI (2005)
[Therapeutic monitoring of antiepileptic drugs]
Zh Nevrol Psikhiatr Im S S Korsakova, 105 (12), 56-9
PubMed 16447570

Johannessen SI (2005)
Can pharmacokinetic variability be controlled for the patient's benefit? The place of TDM for new AEDs
Ther Drug Monit, 27 (6), 710-3
DOI 10.1097/01.ftd.0000179852.39717.3e, PubMed 16404799

Johannessen SI, Helde G, Brodtkorb E (2005)
Levetiracetam concentrations in serum and in breast milk at birth and during lactation
Epilepsia, 46 (5), 775-7
DOI 10.1111/j.1528-1167.2005.54804.x, PubMed 15857447

Publications 2004

Bialer M, Johannessen SI, Kupferberg HJ, Levy RH, Perucca E, Tomson T (2004)
Progress report on new antiepileptic drugs: a summary of the Seventh Eilat Conference (EILAT VII)
Epilepsy Res, 61 (1-3), 1-48
DOI 10.1016/j.eplepsyres.2004.07.010, PubMed 15570674

Brodtkorb E, Klees TM, Nakken KO, Lossius R, Johannessen SI (2004)
Levetiracetam in adult patients with and without learning disability: focus on behavioral adverse effects
Epilepsy Behav, 5 (2), 231-5
DOI 10.1016/j.yebeh.2003.12.005, PubMed 15123025

Tomson T, Beghi E, Sundqvist A, Johannessen SI (2004)
Medical risks in epilepsy: a review with focus on physical injuries, mortality, traffic accidents and their prevention
Epilepsy Res, 60 (1), 1-16
DOI 10.1016/j.eplepsyres.2004.05.004, PubMed 15279865

Publications 2003

Johannessen CU, Johannessen SI (2003)
Valproate: past, present, and future
CNS Drug Rev, 9 (2), 199-216
DOI 10.1111/j.1527-3458.2003.tb00249.x, PubMed 12847559

Johannessen SI, Battino D, Berry DJ, Bialer M, Krämer G, Tomson T, Patsalos PN (2003)
Therapeutic drug monitoring of the newer antiepileptic drugs
Ther Drug Monit, 25 (3), 347-63
DOI 10.1097/00007691-200306000-00016, PubMed 12766564

Lindberger M, Luhr O, Johannessen SI, Larsson S, Tomson T (2003)
Serum concentrations and effects of gabapentin and vigabatrin: observations from a dose titration study
Ther Drug Monit, 25 (4), 457-62
DOI 10.1097/00007691-200308000-00007, PubMed 12883229

Mariero Klees T, Brodtkorb E, Nakken KO, Lossius R, Johannessen SI (2003)
[Levetiracetam in the treatment of epilepsy]
Tidsskr Nor Laegeforen, 123 (11), 1539-41
PubMed 12822020

Nakken KO, Eriksson AS, Lossius R, Johannessen SI (2003)
A paradoxical effect of levetiracetam may be seen in both children and adults with refractory epilepsy
Seizure, 12 (1), 42-6
DOI 10.1016/s1059131102001723, PubMed 12495648

Perucca E, Johannessen SI (2003)
The ideal pharmacokinetic properties of an antiepileptic drug: how close does levetiracetam come?
Epileptic Disord, 5 Suppl 1, S17-26
PubMed 12915337

Rytter E, Johannessen SI, Nakken KO (2003)
[Oral contraceptives in women with epilepsy]
Tidsskr Nor Laegeforen, 123 (12), 1674-5
PubMed 12821987

Williams J, Bialer M, Johannessen SI, Krämer G, Levy R, Mattson RH, Perucca E, Patsalos PN, Wilson JF (2003)
Interlaboratory variability in the quantification of new generation antiepileptic drugs based on external quality assessment data
Epilepsia, 44 (1), 40-5
DOI 10.1046/j.1528-1157.2003.26702.x, PubMed 12581228

Publications 2002

Bialer M, Johannessen SI, Kupferberg HJ, Levy RH, Loiseau P, Perucca E (2002)
Progress report on new antiepileptic drugs: a summary of the Sixth Eilat Conference (EILAT VI)
Epilepsy Res, 51 (1-2), 31-71
DOI 10.1016/s0920-1211(02)00106-7, PubMed 12350382

Publications 2001

Bialer M, Johannessen SI, Kupferberg HJ, Levy RH, Loiseau P, Perucca E (2001)
Progress report on new antiepileptic drugs: a summary of the Fifth Eilat Conference (EILAT V)
Epilepsy Res, 43 (1), 11-58
DOI 10.1016/s0920-1211(00)00171-6, PubMed 11137386

Publications 2000

Berry D, Tomson T, Johannessen SI (2000)
New antiepileptic drugs
Ann Clin Biochem, 37 ( Pt 4), 551-3
PubMed 10902877

Lindberger M, Alenius M, Frisén L, Johannessen SI, Larsson S, Malmgren K, Tomson T (2000)
Gabapentin versus vigabatrin as first add-on for patients with partial seizures that failed to respond to monotherapy: a randomized, double-blind, dose titration study. GREAT Study Investigators Group. Gabapentin in Refractory Epilepsy Add-on Treatment
Epilepsia, 41 (10), 1289-95
DOI 10.1111/j.1528-1157.2000.tb04607.x, PubMed 11051124

Nakken KO, Johannessen SI, Rytter E (2000)
[Adverse effects of antiepileptic agents]
Tidsskr Nor Laegeforen, 120 (26), 3163-5
PubMed 11109365

Svendsen T, Johannessen SI, Nakken KO (2000)
[Topiramate--a new antiepileptic agents]
Tidsskr Nor Laegeforen, 120 (13), 1536-8
PubMed 10916475

Tomson T, Johannessen SI (2000)
Therapeutic monitoring of the new antiepileptic drugs
Eur J Clin Pharmacol, 55 (10), 697-705
DOI 10.1007/s002280050001, PubMed 10663446

Publications 1999

Bialer M, Johannessen SI, Kupferberg HJ, Levy RH, Loiseau P, Perucca E (1999)
Progress report on new antiepileptic drugs: a summary of the fourth Eilat conference (EILAT IV)
Epilepsy Res, 34 (1), 1-41
DOI 10.1016/s0920-1211(98)00108-9, PubMed 10194110

Nakken KO, Johannessen SI, Henriksen O (1999)
[Epilepsy and pregnancy]
Tidsskr Nor Laegeforen, 119 (23), 3437-40
PubMed 10553342

Nakken KO, Johannessen SI, Henriksen O (1999)
[Epilepsy and pregnancy]
Ugeskr Laeger, 161 (46), 6334-8
PubMed 10611831

Publications 1998

Nakken KO, Rytter E, Johannessen SI (1998)
[Gabapentin--a new antiepileptic agent]
Tidsskr Nor Laegeforen, 118 (6), 872-4
PubMed 9543799

Publications 1997

Johannessen SI (1997)
Pharmacokinetics and interaction profile of topiramate: review and comparison with other newer antiepileptic drugs
Epilepsia, 38 Suppl 1, S18-23
DOI 10.1111/j.1528-1157.1997.tb04512.x, PubMed 9092953

Satas S, Johannessen SI, Hoem NO, Haaland K, Sørensen DR, Thoresen M (1997)
Lidocaine pharmacokinetics and toxicity in newborn pigs
Anesth Analg, 85 (2), 306-12
DOI 10.1097/00000539-199708000-00012, PubMed 9249105

Aass H, Johannessen SI, Osnes JB, Skomedal T, Stokke KT (1997)
[Serum digitoxin in concomitant use of antiepileptics in routine therapy]
Tidsskr Nor Laegeforen, 117 (14), 2032-5
PubMed 9235681

Publications 1996

Bialer M, Johannessen SI, Kupferberg HJ, Levy RH, Loiseau P, Perucca E (1996)
Progress report on new antiepileptic drugs: a summary of the Third Eilat Conference
Epilepsy Res, 25 (3), 299-319
DOI 10.1016/s0920-1211(96)00081-2, PubMed 8956930

Publications 1995

Stables JP, Bialer M, Johannessen SI, Kupferberg HJ, Levy RH, Loiseau P, Perucca E (1995)
Progress report on new antiepileptic drugs. A summary of the Second Eilat Conference
Epilepsy Res, 22 (3), 235-46
DOI 10.1016/0920-1211(95)00054-2, PubMed 8991791

Publications 1994

Nakken KO, Henriksen O, Johannessen SI (1994)
[Vigabatrin--a new antiepileptic agent]
Tidsskr Nor Laegeforen, 114 (24), 2843-4
PubMed 7998031

Publications 1993

Skomedal T, Osnes JB, Johannessen SI, Lund PK, Aass H (1993)
[Therapeutic drug monitoring with the help of serum concentration measurements. How are the analytic results distributed in a population?]
Tidsskr Nor Laegeforen, 113 (18), 2242-6
PubMed 8362387

Publications 1992

Johannessen SI (1992)
Pharmacokinetics of valproate in pregnancy: mother-foetus-newborn
Pharm Weekbl Sci, 14 (3A), 114-7
DOI 10.1007/BF01962699, PubMed 1502009

Publications 1991

Reinvang I, Bjartveit S, Johannessen SI, Hagen OP, Larsen S, Fagerthun H, Gjerstad L (1991)
Cognitive function and time-of-day variation in serum carbamazepine concentration in epileptic patients treated with monotherapy
Epilepsia, 32 (1), 116-21
DOI 10.1111/j.1528-1157.1991.tb05621.x, PubMed 1985819

Publications 1990

Johannessen SI (1990)
[Role of drug assays in the treatment of epileptic patients]
Rev Prat, 40 (4), 319-22
PubMed 2305192

Johannessen SI (1990)
Pharmacokinetics of Anti-epileptic Drugs and their Clinical Significance
Behav Neurol, 3 (1), 1-11
DOI 10.3233/BEN-1990-31S102, PubMed 24487080

Nakken KO, Bjørholt PG, Johannessen SI, Løyning T, Lind E (1990)
Effect of physical training on aerobic capacity, seizure occurrence, and serum level of antiepileptic drugs in adults with epilepsy
Epilepsia, 31 (1), 88-94
DOI 10.1111/j.1528-1157.1990.tb05365.x, PubMed 2303017

Publications 1986

Taubøll E, Stokke KT, Gjerstad L, Løyning Y, Johannessen SI (1986)
Association between regularly occurring complex partial seizures and thyroid function parameters
Epilepsia, 27 (4), 419-22
DOI 10.1111/j.1528-1157.1986.tb03561.x, PubMed 3720700

Publications 1984

Henriksen O, Johannessen SI (1984)
Valproate monotherapy
Epilepsia, 25 Suppl 1, S73-7
DOI 10.1111/j.1528-1157.1984.tb05642.x, PubMed 6425051

Publications 1982

Henriksen O, Johannessen SI (1982)
Clinical and pharmacokinetic observations on sodium valproate - a 5-year follow-up study in 100 children with epilepsy
Acta Neurol Scand, 65 (5), 504-23
DOI 10.1111/j.1600-0404.1982.tb03106.x, PubMed 6810648

Myreng Y, Brenna E, Johannessen SI (1982)
[Carbamazepine (Tegretol) poisoning]
Tidsskr Nor Laegeforen, 102 (6), 382-3
PubMed 7157294

Publications 1981

Johannessen SI (1981)
Antiepileptic drugs: pharmacokinetic and clinical aspects
Ther Drug Monit, 3 (1), 17-37
DOI 10.1097/00007691-198101000-00003, PubMed 7015579

Strandjord RE, Aanderud S, Myking OL, Johannessen SI (1981)
Influence of carbamazepine on serum thyroxine and triiodothyronine in patients with epilepsy
Acta Neurol Scand, 63 (2), 111-21
DOI 10.1111/j.1600-0404.1981.tb00754.x, PubMed 6782820

Publications 1980

Strandjord RE, Johannessen SI (1980)
Single-drug therapy with carbamazepine in patients with epilepsy: serum levels and clinical effect
Epilepsia, 21 (6), 655-52
DOI 10.1111/j.1528-1157.1980.tb04319.x, PubMed 6777155

Strandjord RE, Johannessen SI, Aarli JA (1980)
Serum of concentrations of immunoglobulins in patients with epilepsy treated with carbamazepine
Acta Neurol Scand, 61 (4), 260-3
DOI 10.1111/j.1600-0404.1980.tb01491.x, PubMed 6769290

Publications 1979

Johannessen SI, Henriksen O (1979)
Comparative steady state serum levels of valproic acid administered as two different formulations--Deprakine and Orfiril
Acta Neurol Scand, 60 (6), 371-4
DOI 10.1111/j.1600-0404.1979.tb07663.x, PubMed 121513

Publications 1978

Rootwelt K, Ganes T, Johannessen SI (1978)
Effect of carbamazepine, phenytoin and phenobarbitone on serum levels of thyroid hormones and thyrotropin in humans
Scand J Clin Lab Invest, 38 (8), 731-6
DOI 10.3109/00365517809104880, PubMed 105401

Vesterhus P, Johannessen SI (1978)
[Neonatal abstinence syndrome in children whose mothers were treated for epilepsy during pregnancy]
Tidsskr Nor Laegeforen, 98 (29), 1435-6
PubMed 705734

Publications 1977

Johannessen SI (1977)
Preliminary observations on valproic acid kinetics in patients with epilepsy
Arzneimittelforschung, 27 (5), 1083-5
PubMed 328018

Johannessen SI, Strandjord RE, Munthe-Kaas AW (1977)
Lack of effect of clonazepam on serum levels of diphenylhydantoin, phenobarbital and carbamazepine
Acta Neurol Scand, 55 (6), 506-12
DOI 10.1111/j.1600-0404.1977.tb07629.x, PubMed 878840

Publications 1976

Johannessen SI, Gerna M, Bakke J, Strandjord RE, Morselli PL (1976)
CSF concentrations and serum protein binding of carbamazepine and carbamazepine-10,11-epoxide in epileptic patients
Br J Clin Pharmacol, 3 (4), 575-82
DOI 10.1111/j.1365-2125.1976.tb04878.x, PubMed 22216497

Publications 1975

Strandjord RE, Johannessen SI (1975)
[General guidlines for the use of anti-epileptica]
Sykepleien, 62 (1-2), 26
PubMed 1038139

Publications 1974

Bredesen JE, Johannessen SI (1974)
Simultaneous determination of some antiepileptic drugs by gas-liquid chromatography
Epilepsia, 15 (4), 611-7
DOI 10.1111/j.1528-1157.1974.tb04033.x, PubMed 4430306

Johannessen SI, Strandjord RE (1974)
[Antiepileptic drugs--protein binding and interaction]
Tidsskr Nor Laegeforen, 94 (29), 2019-21
PubMed 4421142

Strandjord RE, Johannessen SI (1974)
[General principles for the use of antiepileptic drugs]
Tidsskr Nor Laegeforen, 94 (29), 2018-9
PubMed 4420148

Strandjord RE, Johannessen SI, Halpern LM (1974)
One daily dose of diphenylhydantoin for patients with epilepsy
Epilepsia, 15 (3), 317-27
DOI 10.1111/j.1528-1157.1974.tb04011.x, PubMed 4527914

Publications 1973

Johannessen SI, Strandjord RE (1973)
Concentration of carbamazepine (Tegretol) in serum and in cerebrospinal fluid in patients with epilepsy
Epilepsia, 14 (4), 373-9
DOI 10.1111/j.1528-1157.1973.tb03976.x, PubMed 4521093

Strandfjord RE, Johannessen SI (1973)
[Phenytoin--blood levels and clinical aspects]
Tidsskr Nor Laegeforen, 93 (6), 395-8
PubMed 4698026

Strandjord RE, Johannessen SI (1973)
[Can phenytoin cause hyperglycemia?]
Tidsskr Nor Laegeforen, 93 (33), 2423
PubMed 4776309

Publications 1972

Johannessen SI, Strandjord RE (1972)
The concentration of carbamazepine (Tegretol R) in serum and in cerebrospinal fluid in patients with epilepsy
Acta Neurol Scand Suppl, 51, 445-6
PubMed 4514373

Strandjord RE, Johannessen SI (1972)
One daily dose of diphenylhydantoin (DPH) to patients with epilepsy
Acta Neurol Scand Suppl, 51, 499-500
PubMed 4514392