diff --git a/docs/SymptomsCausedByDrugs/index.html b/docs/SymptomsCausedByDrugs/index.html
index 30ef302ac64..0b45a9c37d4 100644
--- a/docs/SymptomsCausedByDrugs/index.html
+++ b/docs/SymptomsCausedByDrugs/index.html
@@ -40,13 +40,12 @@
     document.addEventListener(
       "DOMContentLoaded",
       event => {
-        const urlSearchParams = new URLSearchParams(window.location.search);
         const name = 'Drug';
         PageInitializer.initializePage(
           {
             symptom: {
               symptomSelectElement: $('#symptomSelect'),
-              selectSymptom: UIUtils.getSearchParam(urlSearchParams, 'symptom', null),
+              selectSymptom: UIUtils.getSearchParamOfCurrentUrl('symptom'),
               onSymptomSelected: symptom => UIUtils.setSearchParamOfCurrentUrl('symptom', symptom),
               prrByVaccineTableElement: $('#prrByVaccineTable'),
               downloadPrrByVaccineTableButton: document.querySelector("#downloadPrrByVaccineTable"),
@@ -54,7 +53,7 @@
             },
             vaccine: {
               vaccineSelectElement: $('#vaccineSelect'),
-              selectVaccine: UIUtils.getSearchParam(urlSearchParams, 'vaccine', null),
+              selectVaccine: UIUtils.getSearchParamOfCurrentUrl('vaccine'),
               onVaccineSelected: vaccine => UIUtils.setSearchParamOfCurrentUrl('vaccine', vaccine),
               prrBySymptomTableElement: $('#prrBySymptomTable'),
               downloadPrrBySymptomTableButton: document.querySelector("#downloadPrrBySymptomTable"),
diff --git a/docs/UIUtils.js b/docs/UIUtils.js
index 530604b8159..d5b113f62a0 100644
--- a/docs/UIUtils.js
+++ b/docs/UIUtils.js
@@ -38,6 +38,11 @@ class UIUtils {
         return UIUtils.getSearchParam(urlParams, searchParam, 'NO').toUpperCase() == 'YES';
     }
 
+    static getSearchParamOfCurrentUrl(searchParam) {
+        const urlSearchParams = new URLSearchParams(window.location.search);
+        return UIUtils.getSearchParam(urlSearchParams, searchParam, null)
+    }
+
     static setSearchParamOfCurrentUrl(nameOfSearchParam, valueOfSearchParam) {
         const url = new URL(window.location.href);
         url.searchParams.set(nameOfSearchParam, valueOfSearchParam);