A single dose of Toradol (ketorolac) provides pain relief for about 4 to 6 hours, which is why it’s dosed every 6 hours when repeated doses are needed. The drug has a half-life of roughly 5 to 6 hours in healthy adults, meaning half of it is cleared from your body in that window. But how long you actually feel the effects depends on the route it’s given, your age, and your kidney function.
How Quickly Toradol Starts Working
The speed of relief depends entirely on how the drug enters your body. Given intravenously (directly into a vein), Toradol reaches peak blood levels in about 1 to 3 minutes. That’s why it’s a go-to in emergency rooms and post-surgical settings where fast pain control matters. An intramuscular injection (into the muscle, usually the thigh or upper arm) takes longer, reaching peak levels in roughly 30 to 45 minutes. Oral tablets, which are sometimes prescribed as a short follow-up to injections, take longer still.
Regardless of the route, most people notice meaningful pain relief within 30 minutes of an IV dose and within an hour of a shot into the muscle.
How Long Pain Relief Lasts
For most adults under 65, a standard 30 mg dose provides effective pain relief for about 6 hours. That’s the dosing interval the FDA labels recommend: 30 mg every 6 hours, up to a maximum of 120 mg per day. Once the 6-hour mark passes, pain typically begins returning as the drug’s concentration in your blood drops below the therapeutic threshold.
The terminal half-life of Toradol is 5.3 to 5.6 hours in healthy adults, with a range of about 3.5 to 9.2 hours. “Half-life” means the time it takes for your body to eliminate half the drug. After roughly 24 to 30 hours (four to five half-lives), the drug is essentially cleared from your system entirely. So while the pain-relieving window is about 6 hours per dose, traces of the medication linger in your body for about a day after your last dose.
Factors That Change How Long It Lasts
Your kidneys do most of the heavy lifting when clearing Toradol. About 91% of the drug and its breakdown products leave through urine, with only about 6% exiting through stool. That means anything affecting kidney function directly changes how long the drug stays active in your body.
Three groups of people clear the drug more slowly and are given lower doses as a result:
- Adults 65 and older: Kidney function naturally declines with age, so the drug hangs around longer. The recommended dose drops to 15 mg every 6 hours, with a daily cap of 60 mg.
- People with impaired kidney function: Reduced clearance means higher drug levels build up faster, increasing the risk of side effects. The same reduced dose applies.
- People weighing less than 110 pounds (50 kg): Lower body weight means a higher concentration per kilogram, so the dose is halved to 15 mg every 6 hours.
If you fall into any of these categories, each dose may feel like it lasts slightly longer because the drug is being eliminated more slowly. But the flip side is a higher risk of side effects, which is why the lower dose exists.
The 5-Day Maximum
Toradol is not meant for ongoing pain management. The FDA limits total use to 5 days across all forms combined (IV, IM, and oral). This is a hard ceiling, not a suggestion. Toradol belongs to the NSAID class, the same family as ibuprofen and naproxen, but it’s significantly more potent. Extended use beyond 5 days sharply increases the risk of stomach ulcers, gastrointestinal bleeding, and kidney damage.
If you received a Toradol injection in the ER or after surgery and were then sent home with oral ketorolac tablets, those days count together. Three days of injections followed by two days of tablets equals five days total.
IV vs. IM vs. Oral: Comparing Routes
The route of administration changes how fast relief starts but doesn’t dramatically change how long each dose lasts. Here’s a practical comparison:
- Intravenous: Peak blood levels in 1 to 3 minutes. Pain relief lasts about 6 hours. Used in hospitals and ERs.
- Intramuscular: Peak blood levels in 30 to 45 minutes. Pain relief lasts about 6 hours. Common in urgent care and post-op settings.
- Oral tablets: Slower absorption with about 20% of the drug broken down during its first pass through the liver. Pain relief still lasts roughly 4 to 6 hours. Used as a short bridge after injectable doses.
The oral form loses some potency to liver metabolism before it ever reaches your bloodstream. That’s why oral ketorolac is always a continuation of injectable treatment, never a standalone prescription.
What to Expect After a Single Dose
If you received one Toradol injection (the most common scenario for ER or urgent care visits), expect pain relief to peak within the first hour or two and then gradually fade over 4 to 6 hours. By 6 to 8 hours after the injection, most of the pain-relieving effect is gone. The drug itself is fully cleared from your body within about 24 hours.
Because Toradol is an anti-inflammatory, not a narcotic, it won’t make you feel drowsy or “out of it” the way opioid painkillers can. The relief simply fades as the drug level drops, and you transition to whatever follow-up pain management your provider recommended, whether that’s over-the-counter NSAIDs, acetaminophen, or another plan.