Martell BA, Arnsten JH, Ray B, et al. The impact of methadone induction on cardiac conduction in opiate users. Ann Intern Med. 2003;139(2):154–5.PubMedCrossRef

Klotz U. Tramadol – the impact of its pharmacokinetic and pharmacodynamic properties on the clinical management of pain. Arzneim Forsch Drug Res. 2003;53(10):681–7.

Grond S, Sablotzki A. Clinical pharmacology of tramadol. Clin Pharmacokinet. 2004;43(13):879–923.PubMedCrossRef

Sporer KA. Buprenorphine: a primer for emergency physicians. Ann Emerg Med. 2004;43:580–4.PubMedCrossRef

Picard N, Cresteil T, Djebli N, Marquet P. In vitro metabolism study of buprenorphine: evidence for new metabolic pathways. Drug Metab Dispos. 2005;33:689–95.PubMedCrossRef