diff --git a/R/radab.R b/R/radab.R
index b4c12b77..0584660e 100644
--- a/R/radab.R
+++ b/R/radab.R
@@ -386,6 +386,14 @@ radab <- function(adsl,
       last_ada
     ))
 
+  # Carry over ARM and ACTARM for all records.
+  arm <- adab %>%
+    filter(!is.na(ARM), !is.na(ACTARM)) %>%
+    select(USUBJID, ARM, ACTARM) %>%
+    distinct(.)
+  adab$ARM <- arm$ARM[match(adab$USUBJID, arm$USUBJID)]
+  adab$ACTARM <- arm$ACTARM[match(adab$USUBJID, arm$USUBJID)]
+
   if (length(na_vars) > 0 && na_percentage > 0) {
     adab <- mutate_na(ds = adab, na_vars = na_vars, na_percentage = na_percentage)
   }
diff --git a/data/cadab.RData b/data/cadab.RData
index fd641cff..b2622699 100644
Binary files a/data/cadab.RData and b/data/cadab.RData differ
diff --git a/tests/testthat/_snaps/row_values.md b/tests/testthat/_snaps/row_values.md
index 8a6c6de9..60a5bbfe 100644
--- a/tests/testthat/_snaps/row_values.md
+++ b/tests/testthat/_snaps/row_values.md
@@ -4698,24 +4698,24 @@
        6 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X 24H     1.08 
        7 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X Predose 1    
        8 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X 24H     1    
-       9 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    1    
-      10 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    0    
-      11 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    0    
-      12 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    1    
-      13 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    1    
-      14 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    0    
-      15 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    0    
-      16 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    1    
-      17 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    1    
-      18 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    1    
-      19 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    0    
-      20 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    0    
-      21 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    1    
-      22 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    0    
-      23 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    1    
-      24 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    1    
-      25 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    0    
-      26 AB12345 AB12345-JPN-4-id-7 <NA>      <NA>      <NA>    0.143
+       9 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    1    
+      10 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    0    
+      11 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    0    
+      12 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    1    
+      13 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    1    
+      14 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    0    
+      15 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    0    
+      16 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    1    
+      17 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    1    
+      18 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    1    
+      19 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    0    
+      20 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    0    
+      21 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    1    
+      22 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    0    
+      23 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    1    
+      24 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    1    
+      25 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    0    
+      26 AB12345 AB12345-JPN-4-id-7 A: Drug X A: Drug X <NA>    0.143
          AVALC             AVALU  
          <chr>             <fct>  
        1 POSITIVE          "titer"
@@ -4837,16 +4837,16 @@
       # A tibble: 10 x 21
          STUDYID USUBJID             ARM            ACTARM         ISTPT     AVAL
          <chr>   <chr>               <fct>          <fct>          <fct>    <dbl>
-       1 AB12345 AB12345-USA-13-id-3 <NA>           <NA>           <NA>     0    
+       1 AB12345 AB12345-USA-13-id-3 A: Drug X      A: Drug X      <NA>     0    
        2 AB12345 AB12345-CHN-3-id-5  A: Drug X      A: Drug X      24H     NA    
-       3 AB12345 AB12345-BRA-9-id-8  <NA>           <NA>           <NA>     1    
+       3 AB12345 AB12345-BRA-9-id-8  A: Drug X      A: Drug X      <NA>     1    
        4 AB12345 AB12345-CHN-11-id-1 C: Combination C: Combination 24H     NA    
-       5 AB12345 AB12345-BRA-9-id-8  <NA>           <NA>           <NA>     0    
+       5 AB12345 AB12345-BRA-9-id-8  A: Drug X      A: Drug X      <NA>     0    
        6 AB12345 AB12345-CHN-3-id-5  A: Drug X      A: Drug X      Predose  1    
-       7 AB12345 AB12345-BRA-1-id-9  <NA>           <NA>           <NA>     0.143
-       8 AB12345 AB12345-CHN-11-id-1 <NA>           <NA>           <NA>     0    
-       9 AB12345 AB12345-USA-13-id-3 <NA>           <NA>           <NA>     1    
-      10 AB12345 AB12345-JPN-4-id-7  <NA>           <NA>           <NA>     1    
+       7 AB12345 AB12345-BRA-1-id-9  C: Combination C: Combination <NA>     0.143
+       8 AB12345 AB12345-CHN-11-id-1 C: Combination C: Combination <NA>     0    
+       9 AB12345 AB12345-USA-13-id-3 A: Drug X      A: Drug X      <NA>     1    
+      10 AB12345 AB12345-JPN-4-id-7  A: Drug X      A: Drug X      <NA>     1    
          AVALC             AVALU   PARAM                                        
          <chr>             <fct>   <fct>                                        
        1 N                 ""      Treatment enhanced ADA, Neutralizing Antibody