Ketorolac is a powerful anti-inflammatory painkiller used for short-term management of moderately severe acute pain. It’s the kind of pain you might experience after surgery, a major dental procedure, or a traumatic injury. Sold under the brand name Toradol, ketorolac stands out from other pain relievers in its class because it’s one of the few that can be given by injection, making it a common choice in emergency rooms and post-surgical recovery.
How Ketorolac Works
Ketorolac belongs to the NSAID family, the same class as ibuprofen and naproxen. It works by blocking an enzyme that produces prostaglandins, chemical messengers your body releases in response to injury. Prostaglandins trigger inflammation, swelling, and pain at the site of damage. By shutting down their production, ketorolac reduces all three at once.
What makes ketorolac different from over-the-counter NSAIDs is potency. It’s significantly stronger, which is why it’s reserved for acute pain situations rather than everyday aches. Its painkilling strength is often compared to opioid medications, but it doesn’t cause the sedation, respiratory depression, or addiction risk that opioids carry. That trade-off is a major reason hospitals use it so frequently.
Common Uses
Ketorolac is designed for pain that’s too severe for standard over-the-counter options but where opioids aren’t ideal. The most common scenarios include:
- Post-surgical pain: It’s frequently given in the recovery room after operations, either alone or alongside other medications to reduce the need for opioids.
- Emergency room pain: Kidney stones, fractures, severe sprains, and other acute injuries are common reasons you might receive a ketorolac injection in the ER.
- Dental procedures: Oral surgeries and extractions that produce significant pain are another typical use.
- Migraine treatment: Ketorolac injections are sometimes used in emergency settings to break severe migraine episodes.
It is not intended for chronic pain, mild pain, or minor conditions. The FDA restricts it strictly to short-term use for moderately severe acute pain that would otherwise require opioid-level treatment.
How It’s Given
Ketorolac comes in three forms: injection (into a vein or muscle), oral tablets, and a nasal spray. The injection is almost always the starting point. Oral tablets are approved only as a follow-up to an initial injection, not as a first dose on their own. This is unusual for a pain medication and reflects how ketorolac is meant to be managed in a clinical setting first.
In practice, many people first encounter ketorolac as a single shot in the emergency room or surgical suite. If pain control needs to continue, you may be switched to oral tablets for a few additional days at home.
The 5-Day Limit
Ketorolac has one of the strictest time limits of any pain medication. The total combined duration of injections and oral tablets must not exceed 5 days. This isn’t a soft recommendation. The risks of serious side effects climb sharply with longer use.
The three main concerns are gastrointestinal bleeding, kidney damage, and cardiovascular events. Ketorolac can cause stomach ulcers, bleeding, or perforation of the stomach or intestinal wall, sometimes without any warning symptoms beforehand. It also puts strain on the kidneys, particularly in people who are dehydrated or already have reduced kidney function. And like other NSAIDs, it raises the risk of heart attack and stroke, with that risk increasing the longer you take it.
These risks are serious enough that the FDA places them in a boxed warning, the strongest safety alert on a drug label.
Effects on Bleeding
Ketorolac temporarily interferes with your blood’s ability to clot by inhibiting platelet function. In one study, a standard 60 mg injection increased bleeding time by about 50%, from roughly 3.5 minutes to just over 5 minutes. The effect is reversible, meaning clotting returns to normal after the drug clears your system, but it’s an important consideration around surgery or for anyone with a bleeding disorder.
Research has shown these effects appear to be dose-related, and even single doses can impair platelet function enough to worsen post-operative bleeding in some patients. This is why your surgical team carefully weighs the benefits of pain control against the bleeding risk before choosing ketorolac.
Who Should Not Take Ketorolac
Several conditions make ketorolac unsafe. It’s contraindicated if you have an active stomach ulcer, recent gastrointestinal bleeding, or a history of ulcer disease. People with advanced kidney impairment or who are at risk for kidney failure due to dehydration cannot take it. It’s also off-limits if you’ve had allergic reactions to aspirin or other NSAIDs, or if you have a bleeding or clotting disorder.
Ketorolac is specifically prohibited for pain management around coronary artery bypass graft surgery due to the elevated cardiovascular risk in that setting.
Dosing Differences for Older Adults
If you’re 65 or older, weigh less than 110 pounds, or have any degree of kidney impairment, the doses are cut significantly. For a single injection into a vein, the dose drops from 30 mg to 15 mg. For a muscular injection, it drops from 60 mg to 30 mg. If multiple doses are needed, the maximum daily amount is halved, from 120 mg down to 60 mg.
Older adults face higher risks from ketorolac across the board. They’re more vulnerable to gastrointestinal bleeding, more likely to have reduced kidney function, and more sensitive to the drug’s effects on blood pressure and fluid balance. The lower doses reflect these realities.
What to Expect When You Receive It
A ketorolac injection typically starts working within 30 minutes, with peak pain relief arriving around one to two hours later. A single dose provides relief for roughly four to six hours. If you’re given a muscular injection, expect some soreness at the injection site.
The most common side effects are nausea, headache, drowsiness, dizziness, and stomach discomfort. These are generally mild and temporary. The serious risks, including GI bleeding, kidney problems, and cardiovascular events, are less common but become more likely with higher doses and longer use, which is exactly why the 5-day ceiling exists.