diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/itemstats/ItemStatOverlay.java b/runelite-client/src/main/java/net/runelite/client/plugins/itemstats/ItemStatOverlay.java
index ea115dc148..ff3922fd92 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/itemstats/ItemStatOverlay.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/itemstats/ItemStatOverlay.java
@@ -29,6 +29,7 @@ import com.google.inject.Inject;
 import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Graphics2D;
+import java.time.Duration;
 import net.runelite.api.Client;
 import net.runelite.api.EquipmentInventorySlot;
 import net.runelite.api.InventoryID;
@@ -39,6 +40,7 @@ import net.runelite.api.widgets.Widget;
 import net.runelite.api.widgets.WidgetID;
 import net.runelite.api.widgets.WidgetInfo;
 import net.runelite.client.game.ItemManager;
+import net.runelite.client.plugins.itemstats.potions.PotionDuration;
 import net.runelite.client.ui.JagexColors;
 import net.runelite.client.ui.overlay.Overlay;
 import net.runelite.client.ui.overlay.tooltip.Tooltip;
@@ -47,6 +49,7 @@ import net.runelite.client.util.ColorUtil;
 import net.runelite.client.util.QuantityFormatter;
 import net.runelite.http.api.item.ItemEquipmentStats;
 import net.runelite.http.api.item.ItemStats;
+import org.apache.commons.lang3.time.DurationFormatUtils;
 
 public class ItemStatOverlay extends Overlay
 {
@@ -151,6 +154,44 @@ public class ItemStatOverlay extends Overlay
 					tooltipManager.add(new Tooltip(tooltip));
 				}
 			}
+
+			PotionDuration p = PotionDuration.get(itemId);
+			if (p != null)
+			{
+				PotionDuration.PotionDurationRange[] durationRanges = p.getDurationRanges();
+				StringBuilder sb = new StringBuilder();
+				if (durationRanges.length == 1)
+				{
+					// Only show "Duration: <time>" if there is one tooltip
+					Duration duration = durationRanges[0].getLowestDuration();
+					sb.append("Duration: ").append(DurationFormatUtils.formatDuration(duration.toMillis(), "m:ss"));
+				}
+				else
+				{
+					// List the effect names and their duration (ranges)
+					for (PotionDuration.PotionDurationRange durationRange : durationRanges)
+					{
+						if (sb.length() > 0)
+						{
+							sb.append("</br>");
+						}
+
+						sb.append(durationRange.getPotionName()).append(": ");
+
+						Duration lowestDuration = durationRange.getLowestDuration();
+						sb.append(DurationFormatUtils.formatDuration(lowestDuration.toMillis(), "m:ss"));
+
+						Duration highestDuration = durationRange.getHighestDuration();
+						if (lowestDuration != highestDuration)
+						{
+							sb.append("~");
+							sb.append(DurationFormatUtils.formatDuration(highestDuration.toMillis(), "m:ss"));
+						}
+					}
+				}
+
+				tooltipManager.add(new Tooltip(sb.toString()));
+			}
 		}
 
 		if (config.equipmentStats())
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/itemstats/potions/PotionDuration.java b/runelite-client/src/main/java/net/runelite/client/plugins/itemstats/potions/PotionDuration.java
new file mode 100644
index 0000000000..26e202163c
--- /dev/null
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/itemstats/potions/PotionDuration.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2020 Adam <Adam@sigterm.info>
+ * Copyright (c) 2020 MMagicala
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.runelite.client.plugins.itemstats.potions;
+
+import com.google.common.collect.ImmutableMap;
+import java.time.Duration;
+import java.util.Map;
+import lombok.Getter;
+import net.runelite.api.ItemID;
+
+public enum PotionDuration
+{
+	ANTIPOISON(Duration.ofSeconds(90), ItemID.ANTIPOISON4, ItemID.ANTIPOISON3, ItemID.ANTIPOISON2, ItemID.ANTIPOISON1),
+	SUPERANTIPOISON(Duration.ofMinutes(12), ItemID.SUPERANTIPOISON4, ItemID.SUPERANTIPOISON3, ItemID.SUPERANTIPOISON2, ItemID.SUPERANTIPOISON1),
+	ANTIDOTE_P(Duration.ofMinutes(9), ItemID.ANTIDOTE4, ItemID.ANTIDOTE3, ItemID.ANTIDOTE2, ItemID.ANTIDOTE1),
+	ANTIDOTE_PP(Duration.ofMinutes(12), ItemID.ANTIDOTE4_5952, ItemID.ANTIDOTE3_5954, ItemID.ANTIDOTE2_5956, ItemID.ANTIDOTE1_5958),
+	ANTIVENOM(new PotionDurationRange[]{
+		new PotionDurationRange("Anti-venom", Duration.ofSeconds(18), Duration.ofSeconds(36)),
+		new PotionDurationRange("Anti-poison", Duration.ofMinutes(12))},
+		ItemID.ANTIVENOM4, ItemID.ANTIVENOM3, ItemID.ANTIVENOM2, ItemID.ANTIVENOM1),
+	ANTIVENOM_P(new PotionDurationRange[]{
+		new PotionDurationRange("Anti-venom", Duration.ofMinutes(3)),
+		new PotionDurationRange("Anti-poison", Duration.ofMinutes(15))},
+		ItemID.ANTIVENOM4_12913, ItemID.ANTIVENOM3_12915, ItemID.ANTIVENOM2_12917, ItemID.ANTIVENOM1_12919),
+	ANTIFIRE(Duration.ofMinutes(6), ItemID.ANTIFIRE_POTION4, ItemID.ANTIFIRE_POTION3, ItemID.ANTIFIRE_POTION2, ItemID.ANTIFIRE_POTION1),
+	EXTENDED_ANTIFIRE(Duration.ofMinutes(12), ItemID.EXTENDED_ANTIFIRE4, ItemID.EXTENDED_ANTIFIRE3, ItemID.EXTENDED_ANTIFIRE2, ItemID.EXTENDED_ANTIFIRE1),
+	SUPER_ANTIFIRE(Duration.ofMinutes(3), ItemID.SUPER_ANTIFIRE_POTION4, ItemID.SUPER_ANTIFIRE_POTION3, ItemID.SUPER_ANTIFIRE_POTION2, ItemID.SUPER_ANTIFIRE_POTION1),
+	EXTENDED_SUPER_ANTIFIRE(Duration.ofMinutes(6), ItemID.EXTENDED_SUPER_ANTIFIRE4, ItemID.EXTENDED_SUPER_ANTIFIRE3, ItemID.EXTENDED_SUPER_ANTIFIRE2, ItemID.EXTENDED_SUPER_ANTIFIRE1),
+	ANTIPOISON_MIX(Duration.ofSeconds(90), ItemID.ANTIPOISON_MIX1, ItemID.ANTIPOISON_MIX2),
+	ANTIPOISON_SUPERMIX(Duration.ofMinutes(6), ItemID.ANTIPOISON_SUPERMIX1, ItemID.ANTIPOISON_SUPERMIX2),
+	ANTIDOTE_PLUS_MIX(Duration.ofMinutes(9), ItemID.ANTIDOTE_MIX1, ItemID.ANTIDOTE_MIX2),
+	EXTENDED_ANTIFIRE_MIX(Duration.ofMinutes(12), ItemID.EXTENDED_ANTIFIRE_MIX1, ItemID.EXTENDED_ANTIFIRE_MIX2),
+	SUPER_ANTIFIRE_MIX(Duration.ofMinutes(3), ItemID.SUPER_ANTIFIRE_MIX1, ItemID.SUPER_ANTIFIRE_MIX2),
+	EXTENDED_SUPER_ANTIFIRE_MIX(Duration.ofMinutes(6), ItemID.EXTENDED_SUPER_ANTIFIRE_MIX1, ItemID.EXTENDED_SUPER_ANTIFIRE_MIX2);
+
+	@Getter
+	private final PotionDurationRange[] durationRanges;
+	private final int[] itemIds;
+
+	PotionDuration(Duration duration, int... itemIds)
+	{
+		PotionDurationRange[] ranges = new PotionDurationRange[1];
+		// Only need the duration, not the potion name or a range
+		ranges[0] = new PotionDurationRange("", duration);
+		this.durationRanges = ranges;
+		this.itemIds = itemIds;
+	}
+
+	PotionDuration(PotionDurationRange[] durationRanges, int... itemIds)
+	{
+		this.durationRanges = durationRanges;
+		this.itemIds = itemIds;
+	}
+
+	private static final Map<Integer, PotionDuration> potions;
+
+	static
+	{
+		ImmutableMap.Builder<Integer, PotionDuration> builder = new ImmutableMap.Builder<>();
+
+		for (PotionDuration potion : values())
+		{
+			for (int id : potion.itemIds)
+			{
+				builder.put(id, potion);
+			}
+		}
+
+		potions = builder.build();
+	}
+
+	public static PotionDuration get(int id)
+	{
+		return potions.get(id);
+	}
+
+	@Getter
+	public static class PotionDurationRange
+	{
+		private final String potionName;
+		private final Duration lowestDuration, highestDuration;
+
+		public PotionDurationRange(String potionName, Duration duration)
+		{
+			this.potionName = potionName;
+			this.lowestDuration = this.highestDuration = duration;
+		}
+
+		public PotionDurationRange(String potionName, Duration lowestDuration, Duration highestDuration)
+		{
+			this.potionName = potionName;
+			this.lowestDuration = lowestDuration;
+			this.highestDuration = highestDuration;
+		}
+	}
+
+}