diff --git a/chrome/content/zotero/xpcom/data/search.js b/chrome/content/zotero/xpcom/data/search.js
index cffba7959a..aa7ebcf7c9 100644
--- a/chrome/content/zotero/xpcom/data/search.js
+++ b/chrome/content/zotero/xpcom/data/search.js
@@ -1039,7 +1039,7 @@ Zotero.Search.prototype._buildQuery = Zotero.Promise.coroutine(function* () {
 	}
 	
 	if (retracted) {
-		sql += " AND (itemID IN (SELECT itemID FROM retractedItems))";
+		sql += " AND (itemID IN (SELECT itemID FROM retractedItems WHERE flag=0))";
 	}
 	
 	if (publications) {
diff --git a/chrome/content/zotero/xpcom/retractions.js b/chrome/content/zotero/xpcom/retractions.js
index f7f3a2a477..44d51d0ac1 100644
--- a/chrome/content/zotero/xpcom/retractions.js
+++ b/chrome/content/zotero/xpcom/retractions.js
@@ -28,6 +28,10 @@ Zotero.Retractions = {
 	TYPE_PMID: 'p',
 	TYPE_NAMES: ['DOI', 'PMID'],
 	
+	FLAG_NORMAL: 0,
+	FLAG_HIDDEN: 1,
+	FLAG_NO_CITATION_WARNING: 2,
+	
 	_prefObserverRegistered: false,
 	_initialized: false,
 	_version: 1,
@@ -60,13 +64,13 @@ Zotero.Retractions = {
 		
 		// Load existing retracted items
 		var rows = await Zotero.DB.queryAsync(
-			"SELECT libraryID, itemID, DI.itemID IS NOT NULL AS deleted FROM items "
-				+ "JOIN retractedItems USING (itemID) "
+			"SELECT libraryID, itemID, DI.itemID IS NOT NULL AS deleted, RI.flag FROM items "
+				+ "JOIN retractedItems RI USING (itemID) "
 				+ "LEFT JOIN deletedItems DI USING (itemID)"
 		);
 		for (let row of rows) {
-			this._retractedItems.add(row.itemID);
-			if (!row.deleted) {
+			this._retractedItems.set(row.itemID, row.flag);
+			if (!row.deleted && row.flag != this.FLAG_HIDDEN) {
 				if (!this._retractedItemsByLibrary[row.libraryID]) {
 					this._retractedItemsByLibrary[row.libraryID] = new Set();
 				}
@@ -88,7 +92,7 @@ Zotero.Retractions = {
 		this._itemKeys = {};
 		this._queuedItems = new Set();
 		this._queuedPrefixStrings = new Set();
-		this._retractedItems = new Set();
+		this._retractedItems = new Map();
 		this._retractedItemsByLibrary = {};
 		this._librariesWithRetractions = new Set();
 		this._cacheVersion = null;
@@ -99,11 +103,53 @@ Zotero.Retractions = {
 	},
 	
 	/**
-	 * @param {Zotero.Item}
+	 * If item was retracted and the retraction hasn't been hidden
+	 *
+	 * @param {Zotero.Item} item
 	 * @return {Boolean}
 	 */
 	isRetracted: function (item) {
-		return this._retractedItems.has(item.id);
+		var flag = this._retractedItems.get(item.id);
+		return flag !== undefined && flag !== this.FLAG_HIDDEN;
+	},
+	
+	/**
+	 * If item was retracted and hasn't been marked to not show citation warnings
+	 *
+	 * @param {Zotero.Item}
+	 * @return {Boolean}
+	 */
+	shouldShowCitationWarning: function (item) {
+		return this._retractedItems.get(item.id) === this.FLAG_NORMAL;
+	},
+	
+	/**
+	 * Don't show any future retraction warnings for this item
+	 *
+	 * @param {Zotero.Item} item
+	 * @return {Promise}
+	 */
+	hideRetraction: async function (item) {
+		return this._updateItemFlag(item, this.FLAG_HIDDEN);
+	},
+	
+	/**
+	 * Don't show future citation warnings for this item
+	 *
+	 * @param {Zotero.Item} item
+	 * @return {Promise}
+	 */
+	disableCitationWarningsForItem: async function (item) {
+		return this._updateItemFlag(item, this.FLAG_NO_CITATION_WARNING);
+	},
+	
+	_updateItemFlag: async function (item, flag) {
+		this._retractedItems.set(item.id, flag);
+		await Zotero.DB.queryAsync(
+			"UPDATE retractedItems SET flag=? WHERE itemID=?",
+			[flag, item.id]
+		);
+		await Zotero.Notifier.trigger('modify', 'item', [item.id]);
 	},
 	
 	getRetractionsFromJSON: Zotero.serial(async function (jsonItems) {
@@ -369,8 +415,9 @@ Zotero.Retractions = {
 				// handled for newly detected items in _addEntry(), which gets called by
 				// _updateItem() above after a delay (such that the item won't yet be retracted
 				// here).
-				if (this._retractedItems.has(item.id)) {
-					if (item.deleted) {
+				let flag = this._retractedItems.get(item.id);
+				if (flag !== undefined) {
+					if (item.deleted || flag == this.FLAG_HIDDEN) {
 						await this._removeLibraryRetractedItem(item.libraryID, item.id);
 					}
 					else {
@@ -577,7 +624,7 @@ Zotero.Retractions = {
 		// Remove existing retracted items that no longer match
 		var removed = 0;
 		if (removeExisting) {
-			for (let itemID of this._retractedItems) {
+			for (let itemID of this._retractedItems.keys()) {
 				if (!allItemIDs.has(itemID)) {
 					let item = await Zotero.Items.getAsync(itemID);
 					await this._removeEntry(itemID, item.libraryID);
@@ -800,13 +847,17 @@ Zotero.Retractions = {
 		delete o.retractionDOI;
 		delete o.retractionPMID;
 		
-		var sql = "REPLACE INTO retractedItems VALUES (?, ?)";
+		var sql = "REPLACE INTO retractedItems (itemID, data) VALUES (?, ?)";
 		await Zotero.DB.queryAsync(sql, [itemID, JSON.stringify(o)]);
 		
 		var item = await Zotero.Items.getAsync(itemID);
 		var libraryID = item.libraryID;
-		this._retractedItems.add(itemID);
-		if (!item.deleted) {
+		// Check whether the retraction is already hidden by the user
+		var flag = this._retractedItems.get(itemID);
+		if (flag === undefined) {
+			this._retractedItems.set(itemID, this.FLAG_NORMAL);
+		}
+		if (!item.deleted && flag !== this.FLAG_HIDDEN) {
 			if (!this._retractedItemsByLibrary[libraryID]) {
 				this._retractedItemsByLibrary[libraryID] = new Set();
 			}
diff --git a/chrome/content/zotero/xpcom/schema.js b/chrome/content/zotero/xpcom/schema.js
index 763263db9d..0e5bcd631b 100644
--- a/chrome/content/zotero/xpcom/schema.js
+++ b/chrome/content/zotero/xpcom/schema.js
@@ -2518,6 +2518,10 @@ Zotero.Schema = new function(){
 				yield Zotero.DB.queryAsync("CREATE TABLE IF NOT EXISTS retractedItems (\n	itemID INTEGER PRIMARY KEY,\n	data TEXT,\n	FOREIGN KEY (itemID) REFERENCES items(itemID) ON DELETE CASCADE\n);");
 			}
 			
+			else if (i == 105) {
+				yield Zotero.DB.queryAsync("ALTER TABLE retractedItems ADD COLUMN flag INT DEFAULT 0");
+			}
+			
 			// If breaking compatibility or doing anything dangerous, clear minorUpdateFrom
 		}
 		
diff --git a/resource/schema/userdata.sql b/resource/schema/userdata.sql
index be41031bf8..998af81053 100644
--- a/resource/schema/userdata.sql
+++ b/resource/schema/userdata.sql
@@ -1,4 +1,4 @@
--- 104
+-- 105
 
 -- Copyright (c) 2009 Center for History and New Media
 --                    George Mason University, Fairfax, Virginia, USA
@@ -289,6 +289,7 @@ CREATE TABLE publicationsItems (
 CREATE TABLE retractedItems (
 	itemID INTEGER PRIMARY KEY,
 	data TEXT,
+	flag INT DEFAULT 0,
 	FOREIGN KEY (itemID) REFERENCES items(itemID) ON DELETE CASCADE
 );
 
diff --git a/test/tests/retractionsTest.js b/test/tests/retractionsTest.js
index 2ac1994ab1..997a894619 100644
--- a/test/tests/retractionsTest.js
+++ b/test/tests/retractionsTest.js
@@ -174,6 +174,23 @@ describe("Retractions", function() {
 	});
 	
 	
+	describe("#shouldShowCitationWarning()", function () {
+		it("should return false if citation warning is hidden", async function () {
+			var item = await createRetractedItem();
+			assert.isTrue(Zotero.Retractions.shouldShowCitationWarning(item));
+			await Zotero.Retractions.disableCitationWarningsForItem(item);
+			assert.isFalse(Zotero.Retractions.shouldShowCitationWarning(item));
+		});
+		
+		it("should return false if retraction is hidden", async function () {
+			var item = await createRetractedItem();
+			assert.isTrue(Zotero.Retractions.shouldShowCitationWarning(item));
+			await Zotero.Retractions.hideRetraction(item);
+			assert.isFalse(Zotero.Retractions.shouldShowCitationWarning(item));
+		});
+	});
+	
+	
 	describe("#getRetractionsFromJSON()", function () {
 		it("should identify object with retracted DOI", async function () {
 			var spy = sinon.spy(Zotero.HTTP, 'request');
@@ -275,6 +292,44 @@ describe("Retractions", function() {
 			assert.equal(zp.collectionsView.selectedTreeRow.id, "L" + userLibraryID);
 		});
 		
+		it("should hide Retracted Items collection when last retracted item is marked as hidden", async function () {
+			var rowID = "R" + userLibraryID;
+			
+			// Create item
+			var item = await createRetractedItem();
+			assert.ok(zp.collectionsView.getRowIndexByID(rowID));
+			
+			// Select Retracted Items collection
+			await zp.collectionsView.selectByID(rowID);
+			await waitForItemsLoad(win);
+			
+			await Zotero.Retractions.hideRetraction(item);
+			
+			await Zotero.Promise.delay(50);
+			// Retracted Items should be gone
+			assert.isFalse(zp.collectionsView.getRowIndexByID(rowID));
+			// And My Library should be selected
+			assert.equal(zp.collectionsView.selectedTreeRow.id, "L" + userLibraryID);
+		});
+		
+		it("shouldn't hide Retracted Items collection when last retracted item is marked to not show a citation warning", async function () {
+			var rowID = "R" + userLibraryID;
+			
+			// Create item
+			var item = await createRetractedItem();
+			assert.ok(zp.collectionsView.getRowIndexByID(rowID));
+			
+			// Select Retracted Items collection
+			await zp.collectionsView.selectByID(rowID);
+			await waitForItemsLoad(win);
+			
+			await Zotero.Retractions.disableCitationWarningsForItem(item);
+			
+			await Zotero.Promise.delay(50);
+			// Should still be showing
+			assert.ok(zp.collectionsView.getRowIndexByID("R" + userLibraryID));
+		});
+		
 		it("should show Retracted Items collection when retracted item is restored from trash", async function () {
 			// Create trashed item
 			var item = await createRetractedItem({ deleted: true });