About Coding in MedDRA I am coding a study conducted in patients with Diabetes Mellitus. One of the adverse events is "hypoglycemia" or "decreased blood sugar". However they are treated as two different adverse events and coded to two different MedDRA codes. I do not quite understand why that is so. I was faced with two recent problems in MedDRA concerning terms "VERTIGO" and "DIPLOPIA". "Vertigo" is classified as belonging to the Ear and Labyrinth Disorders SOC. In my particular situation, the vertigo was a so-called "central vertigo" in accordance with Harrisson's and therefore, in my opinion, should fall in the Nervous disorders SOC. Because the associated SOC for the term "Vertigo" was not appropriate, I chose the term "Balance impaired" instead. The same occurred with the term "Diplopia" which is classified in Eye disorders SOC which is not adequate in our case since the diplopia had a central origin. What do you think? What is the MedDRA code for the suspicion of a disease (for example "suspicion of heart infarction")? What is the distinction between the MedDRA terms PT MELAENA and PT FEACES DISCOLOURED? What is the MedDRA term "CONDITION AGGRAVATED" and how should it be used? Many MedDRA terms use the abbreviations NOS or NEC. What do they mean and how do they differ?   Back

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