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| '''Caution should be taken in if the animal suffers from any of the following pre-existing medical conditions:''' | | '''Caution should be taken in if the animal suffers from any of the following pre-existing medical conditions:''' |
− | *Heart disease, especially heart block and arrythmias. | + | *Heart disease, especially heart block and arrythmias |
− | *Diabetes: increases hyperglycaemia. | + | *Diabetes: increases hyperglycaemia |
− | *Glaucoma [closed angle type]. | + | *Glaucoma [closed angle type] |
| *Impaired liver function [TCAs metabolised by liver] | | *Impaired liver function [TCAs metabolised by liver] |
| *Hyperthyroidism [enhanced response to TCAs] | | *Hyperthyroidism [enhanced response to TCAs] |
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| '''Care should be taken if used in conjunction with any of the following drugs, which may interact and cause adverse effects:''' | | '''Care should be taken if used in conjunction with any of the following drugs, which may interact and cause adverse effects:''' |
− | *Morphine: enhanced analgesia and respiratory depression | + | *Morphine: enhanced analgesia and respiratory depression. |
| *MAOIs: risk of serotonin syndrome, advise washout period of 2-3 weeks between treatment with these drugs. | | *MAOIs: risk of serotonin syndrome, advise washout period of 2-3 weeks between treatment with these drugs. |
| *Phenothiazines: increased shared adverse effects [CVS, etc], mutual increase in serum levels due to competition for cytochrome p450. Definite risk of severe adverse affects and toxicity. | | *Phenothiazines: increased shared adverse effects [CVS, etc], mutual increase in serum levels due to competition for cytochrome p450. Definite risk of severe adverse affects and toxicity. |
− | *SSRIs: Fluoxetine inhibits Cytochrome p450, leading to toxic levels of TCA. | + | *SSRIs: Fluoxetine inhibits Cytochrome p450, leading to toxic levels of TCA. Cimetidine also has this effect. |
− | *Cimetidine does the same.
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| *Fibre rich diets reduce availability of TCAs. | | *Fibre rich diets reduce availability of TCAs. |
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| *Head pain | | *Head pain |
| *Agitation | | *Agitation |
− | *Increased heart rate, body temperature, respiratory rate. | + | *Increased heart rate, body temperature, respiratory rate |
| *Muscular rigidity | | *Muscular rigidity |
| *Convulsions | | *Convulsions |