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In order to try to overcome the common clinical experience of patients who do not take the drugs prescribed for them (Wilcox et al., 1965) a sustained release form of amitriptyline (Lentizol) has recently been made available. This trial was undertaken to test the efficacy of this formulation given once daily at night compared to standard amitriptyline given thrice daily.
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Ijaz Haider (1972) studied this question.
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