diff --git a/R/Figures.R b/R/Figures.R
index efb56c8e..b20d6c89 100644
--- a/R/Figures.R
+++ b/R/Figures.R
@@ -919,7 +919,10 @@ TADA_TwoCharacteristicScatterplot <- function(.data, id_cols = "TADA.ComparableD
         showgrid = FALSE, tickcolor = "black"
       ),
       yaxis = list(
-        title = paste0(param1$TADA.CharacteristicName[1], "  ", param1$TADA.ResultMeasure.MeasureUnitCode[1]),
+        title =  stringr::str_remove_all(stringr::str_remove_all(
+          stringr::str_remove_all(paste0(param1$TADA.CharacteristicName[1], "  ", param1$TADA.ResultMeasure.MeasureUnitCode[1]), stringr::fixed(" (NA)")),
+          stringr::fixed("NA ")
+        ), stringr::fixed(" NA")),
         titlefont = list(size = 16, family = "Arial"),
         tickfont = list(size = 16, family = "Arial"),
         hoverformat = ",.4r", linecolor = "black", rangemode = "tozero",
@@ -928,7 +931,10 @@ TADA_TwoCharacteristicScatterplot <- function(.data, id_cols = "TADA.ComparableD
       yaxis2 = list(
         side = "right",
         overlaying = "y",
-        title = paste0(param2$TADA.CharacteristicName[1], "  ", param2$TADA.ResultMeasure.MeasureUnitCode[1]),
+        title =  stringr::str_remove_all(stringr::str_remove_all(
+          stringr::str_remove_all(paste0(param2$TADA.CharacteristicName[1], "  ", param2$TADA.ResultMeasure.MeasureUnitCode[1]), stringr::fixed(" (NA)")),
+          stringr::fixed("NA ")
+        ), stringr::fixed(" NA")),
         titlefont = list(size = 16, family = "Arial"),
         tickfont = list(size = 16, family = "Arial"),
         hoverformat = ",.4r", linecolor = "black", rangemode = "tozero",
@@ -951,11 +957,14 @@ TADA_TwoCharacteristicScatterplot <- function(.data, id_cols = "TADA.ComparableD
       data = param1,
       x = ~ as.Date(ActivityStartDate),
       y = ~TADA.ResultMeasureValue,
-      name = paste0(
+      name = stringr::str_remove_all(stringr::str_remove_all(
+        stringr::str_remove_all(paste0(
         param1$TADA.ResultSampleFractionText, " ",
         param1$TADA.CharacteristicName, " ",
         param1$TADA.MethodSpeciationName
-      ),
+      ), stringr::fixed(" (NA)")),
+      stringr::fixed("NA ")
+      ), stringr::fixed(" NA")),
       marker = list(
         size = 10,
         color = tada.pal[5],
@@ -992,11 +1001,14 @@ TADA_TwoCharacteristicScatterplot <- function(.data, id_cols = "TADA.ComparableD
       data = param2,
       x = ~ as.Date(ActivityStartDate),
       y = ~TADA.ResultMeasureValue,
-      name = paste0(
-        param2$TADA.ResultSampleFractionText, " ",
-        param2$TADA.CharacteristicName, " ",
-        param2$TADA.MethodSpeciationName
-      ),
+      name = stringr::str_remove_all(stringr::str_remove_all(
+        stringr::str_remove_all(paste0(
+          param2$TADA.ResultSampleFractionText, " ",
+          param2$TADA.CharacteristicName, " ",
+          param2$TADA.MethodSpeciationName
+        ), stringr::fixed(" (NA)")),
+        stringr::fixed("NA ")
+      ), stringr::fixed(" NA")),
       marker = list(
         size = 10, color = tada.pal[3],
         line = list(color = tada.pal[12], width = 2)