Torkell Jóhannesson

Analgesic Action and Brain and Plasma Levels of Morphine and Codeine in Morphine Tolerant, Codeine Tolerant and Non‐Tolerant Rats

Morphine Analgesia in Rats at Various Ages

Effects of prenatally-administered morphine on brain development and resultant tolerance to the analgesic effect of morphine in offspring of morphine treated rats.

The effects of maternally-administered morphine on rat foetal development and resultant tolerance to the analgesic effect of morphine.

Infusion of Morphine in Maternal Rats at Near-Term: Maternal and Foetal Distribution and Effects on Analgesia, Brain DNA, RNA and Protein

Acetylcholine in the Brain of Morphine Tolerant and Non-Tolerant Rats

THE EFFECT OF CODEINE TOLERANCE ON HEPATIC MICROSOMAL DRUG METABOLISM IN THE RAT.

Effects of Morphine Infusion in Maternal Rats at Near-term on Ribosome Size Distribution in Foetal and Maternal Rat Brain

Distribution of 14C-Morphine and Macromolecules in the Brain and Liver and their Nuclei in Pregnant Rats and their Foetuses after Infusion of Morphine into Pregnant Rats at Near-Term

Tolerance to Morphine and Codeine Analgesia and Hepatic Enzymic Microsomal Drug Metabolism in the Rat