Hønnås A, Reimers A, Spigset O. Dosering av digitoksin i klinisk praksis. Tidsskr Nor Legeforen 2010; 130: 1334-6.
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Davies SJC, Westin AA, Castberg I, Lewis G, Lennard MS, Taylor S, Spigset O. Characterisation of zuclopenthixol metabolism by in vitro and therapeutic drug monitoring studies. Acta Psychiatr Scand 2010; 122: 444-53
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Jónsdóttir H, Opjordsmoen S, Birkenæs AB, Engh JA, Ringen PA, Vaskinn A, Aamo TO, Friis S, Andreassen OA. Medication adherence in outpatients with severe mental disorders: relation between self-reports and serum level. J Clin Psychopharmacol 2010; 30: 169-75.
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Reis M, Aamo T, Spigset O, Ahlner J. Serum concentration of antidepressant drugs in a naturalistic setting: compilation based on a large therapeutic drug monitoring database. Ther Drug Monit 2009; 31: 42-56.
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Castberg I, Spigset O. Prescribing patterns and the use of therapeutic drug monitoring of psychotropic drugs in a psychiatric high-security unit. Ther Drug Monit 2008; 30: 597-603.
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Helland A, Espnes K, Reimers A, Aamo T, Zahlsen K, Rygnestad T, Spigset O. Legemiddel- og rusmiddelanalyser som øyeblikkelig hjelp. Tidsskr Nor Lægeforen 2008; 128: 42-5.
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Castberg I, Spigset O. Effects of comedication on the serum levels of aripiprazole: evidence form a routine therapeutic drug monitoring service. Pharmacopsychiatry 2007; 40: 107-10.
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Helland A, Spigset O. Low serum concentrations of reboxetine in 2 patients treated with CYP3A4 inducers. J Clin Psychopharmacol 2007; 27: 308-10.
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Castberg I, Skogvoll E, Spigset O. Quetiapine and drug interactions: evidence form a therapeutic drug monitoring service. J Clin Psychiatry 2007; 68: 1540-5.
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Güzey C, Spigset O. Low serum concentrations of paroxetine in two CYP2D6 ultrarapid metabolizers. J Clin Psychopharmacology 2006; 26: 211-2.
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Reimers A, Skogvoll E, Sund JK, Spigset O. Drug interactions between lamotrigine and psychoactive drugs: Evidence from a therapeutic drug monitoring services. J Clin Psychopharmacol 2005; 25: 342-8.
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Castberg I, Spigset O. Serum concentrations of risperidone and 9-hydroxyrisperidone after administration of the long-acting injectable form of risperidone. Ther Drug Monit 2005; 27: 103-6.
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