Ketorolac: Patient-Friendly Medicine Information (Australia)

Ketorolac is a pain-relieving medicine in the NSAID (non-steroidal anti-inflammatory drug) family. It is used for short-term management of moderate to severe pain and is known for strong analgesic (pain-relieving) effects. This page explains what ketorolac is, how it works, how the body handles it, what it’s used for, practical tips to use it safely, and key interactions and precautions relevant to people in Australia.

Important: Medicines affect people differently. Always follow the instructions provided by your prescriber or pharmacist and read the Consumer Medicines Information (CMI) that comes with your product.

Basic product information

• Generic name: Ketorolac
• Drug type: NSAID (painkiller/anti-inflammatory)
• Common formulations: Tablets and injection (depending on local availability and indication)
• Typical duration: Often limited to short-term use due to safety considerations (especially stomach/bleeding and kidney risk)
• Brand names: May vary by supplier and product type
• Class/ATC: Analgesic NSAID

In Australia, ketorolac products may be supplied under specific circumstances and in specific forms. Availability can vary by location and supply chain.

How ketorolac works (mechanism of action)

Ketorolac works by blocking enzymes called COX-1 and COX-2 (cyclooxygenase enzymes). These enzymes are involved in the production of prostaglandins—chemicals that contribute to:

• Pain signalling in the body
• Inflammation and swelling
• Fever (though ketorolac is primarily used for pain)

By reducing prostaglandin formation, ketorolac can relieve pain and reduce inflammation. Like other NSAIDs, it can also affect protective functions in the stomach and kidneys, which is why safety precautions matter.

Pharmacokinetics: what the body does to ketorolac

“Pharmacokinetics” describes absorption, distribution, metabolism, and elimination. While exact values vary between individuals and formulations, the general pattern is as follows:

Absorption

Ketorolac is absorbed after oral dosing and reaches peak levels within hours (often described as roughly about 0.5 to 1 hour for some formulations). Injectable forms typically achieve faster and more predictable onset.

Distribution

After absorption, ketorolac distributes through body tissues and binds moderately to proteins in the blood.

Metabolism

Ketorolac is mainly metabolised by the liver into inactive forms (metabolites).

Elimination

Ketorolac and its metabolites are eliminated primarily via the kidneys. This is a key reason dosing and caution are required for people with kidney impairment.

Half-life (general concept)

The “half-life” is the time it takes for drug levels in the body to reduce by half. Ketorolac’s half-life is typically several hours, which supports dosing at intervals during the short treatment window.

What ketorolac is used for (indications)

Ketorolac is used for short-term management of moderate to severe acute pain, such as:

• Post-procedure or post-surgical pain (where appropriate)
• Acute pain episodes requiring strong analgesia
• Situations where an NSAID is considered suitable based on your health profile

It is not generally intended for long-term treatment of chronic pain conditions. Your clinician will consider your risk factors (stomach ulcer/bleeding history, kidney function, other medications, age, and more) before recommending ketorolac.

Typical dosing and timing

Dosing depends on age, pain severity, kidney function, formulation, and whether you are using it alone or with other pain medicines. Always follow the dosing schedule provided with your specific product.

General principles

• Use the lowest effective dose for the shortest possible time.
• A maximum treatment duration is commonly applied for safety reasons, particularly for oral use.
• Kidney impairment may require dose reduction or avoidance.
• Older adults may be at higher risk of side effects (and may require lower dosing).

Common schedule examples (for understanding only)

The exact amounts differ by product strength and whether you are using oral tablets or injection. The examples below are provided to help you understand how dosing is typically structured, not as personal dosing advice.

Do not combine ketorolac with other NSAIDs (e.g., ibuprofen, naproxen, diclofenac) unless your pharmacist or clinician specifically tells you to. This helps reduce the risk of side effects.

How to take ketorolac

• Take it exactly as directed.
• Use consistent timing if you are on a scheduled regimen.
• If you miss a dose, take it when you remember unless it’s close to the next dose—then skip the missed dose.
• Do not take extra to “catch up.”

Food interactions: can you take ketorolac with meals?

Food can affect how quickly medicines are absorbed. With many oral NSAIDs, taking a dose with food can help reduce stomach discomfort. For ketorolac:

• Taking with food may lessen irritation for some people.
• Food may delay absorption slightly, but it does not usually reduce the overall pain-relieving effect.

Follow the directions in your product leaflet. If your product advises taking with food, do so to improve tolerance.

Alcohol interactions

Alcohol can increase the risk of stomach irritation and gastrointestinal bleeding when combined with NSAIDs. Ketorolac + alcohol may also worsen dizziness or stomach upset.

Recommendation: Avoid alcohol while taking ketorolac, or limit to very small amounts if your healthcare professional says it’s acceptable. If you notice black stools, vomiting blood, severe stomach pain, or unusual weakness, seek urgent medical advice.

Other medicine interactions (important)

Ketorolac can interact with several medicines. Tell your pharmacist or clinician about all medicines you use, including over-the-counter products, vitamins, herbal supplements, and “natural” remedies.

Common interaction categories

• Other NSAIDs (e.g., ibuprofen, naproxen, aspirin for pain): increased risk of stomach ulcers/bleeding and kidney problems.
• Blood thinners (e.g., warfarin, apixaban, rivaroxaban, dabigatran): may increase bleeding risk.
• Antiplatelet medicines (e.g., clopidogrel, aspirin): may increase bleeding risk.
• Selective serotonin reuptake inhibitors (SSRIs) (e.g., sertraline, fluoxetine, citalopram): may increase risk of GI bleeding.
• Diuretics and blood pressure medicines (ACE inhibitors/ARBs such as enalapril, lisinopril, losartan): the combination can increase risk of kidney injury in some people, especially with dehydration.
• Lithium: NSAIDs can raise lithium levels and increase toxicity risk.
• Methotrexate: NSAIDs may increase methotrexate levels.
• Probenecid: may increase NSAID levels.
• Corticosteroids (e.g., prednisone): can increase GI bleeding risk when combined.
• Dehydration risk medicines/situations: vomiting, diarrhoea, or poor fluid intake can make kidney effects more likely.

Avoid “double NSAID” accidentally

Many cold and flu products include painkillers. Check labels carefully to avoid taking two NSAIDs at once. If you’re unsure, ask your pharmacist.

Safety profile: who should be cautious?

Ketorolac can be effective for short-term pain relief, but it carries risks typical of NSAIDs, especially when used too long or at higher doses. The most important concerns include stomach/intestinal bleeding, kidney effects, and cardiovascular risk.

Major risks to understand

• Gastrointestinal (GI) irritation, ulcer, bleeding: Ketorolac may cause stomach pain, gastritis, ulcers, and bleeding—sometimes without warning.
• Kidney impairment: Because ketorolac is eliminated through the kidneys and affects blood flow to the kidneys, it can worsen kidney function.
• Fluid retention and blood pressure changes: NSAIDs can affect blood pressure and fluid balance.
• Cardiovascular risk: Some NSAIDs can increase risk of cardiovascular events in certain people, especially with longer use.
• Allergic reactions: People with a history of NSAID allergy or asthma triggered by NSAIDs may be at higher risk.
• Reduced effect of protective kidney function in dehydration: Risk increases with vomiting, diarrhoea, or not drinking enough fluids.

Common side effects

• Nausea or stomach discomfort
• Headache or dizziness
• Heartburn
• Fluid retention (less common)

Serious warning signs (seek urgent help)

Contact emergency services or urgent medical care if you experience:

• Black, tarry stools or blood in stools
• Vomiting blood or vomit that looks like coffee grounds
• Severe stomach pain or persistent vomiting
• Signs of allergy (swelling of face/lips, wheezing, difficulty breathing, widespread rash)
• Unusual bruising/bleeding
• Reduced urination or swelling in legs/ankles
• Chest pain, sudden shortness of breath, or weakness on one side

Who may need extra caution

• Age 65 years or older
• History of gastric ulcer, GI bleeding, or severe reflux
• Kidney problems or dehydration
• Heart disease, stroke history, or risk factors
• People taking blood thinners or multiple medicines affecting bleeding
• Asthma triggered by NSAIDs
• Pregnancy (especially later pregnancy) and breastfeeding—discuss options with a healthcare professional

Practical use tips (to get the benefit safely)

• Keep it short: Use ketorolac for the brief time period directed, rather than “until it feels better.”
• Use the lowest effective dose: This can reduce side effects.
• Stay hydrated: If you’re unwell (vomiting/diarrhoea) or not drinking enough, seek advice—kidney risk increases.
• Protect your stomach: Taking with food may help. Avoid additional irritants like alcohol.
• Do not mix NSAIDs: Avoid ibuprofen, naproxen, diclofenac, and aspirin for pain unless specifically advised.
• Check product labels: OTC cold/flu medicines may contain NSAIDs or aspirin.
• Plan pain control: Consider non-medicine strategies (rest, cold/heat packs, gentle movement) as appropriate.
• Know your red flags: Be alert for GI bleeding and kidney warning signs.

Alternative options for pain relief

Depending on the cause of pain, alternatives may include other analgesics and non-drug strategies. Some options commonly considered in Australia include:

Non-NSAID pain relief

• Paracetamol (acetaminophen): Often used for mild to moderate pain and generally less likely to irritate the stomach than NSAIDs.
• Topical options: For some musculoskeletal conditions, topical NSAIDs or other local treatments may reduce systemic exposure.

Other NSAIDs

If ketorolac isn’t suitable due to your risk profile, your clinician may consider another NSAID with a different dosing plan or formulation. However, the same safety themes apply (GI and kidney risk).

Non-medicine strategies

• Cold or heat therapy (depending on the injury stage)
• Physiotherapy or exercise guidance
• Relaxation techniques and pacing activities
• For severe or persistent pain, a tailored plan may be needed

Choose alternatives based on your diagnosis and personal risk factors. Your pharmacist can help compare options and check interactions.

Australia market and legal context

In Australia, access to medicines is regulated by the Australian Therapeutic Goods Administration (TGA) and governed by scheduling and supply rules. The classification and availability of ketorolac products may depend on:

• The formulation (tablet vs injection)
• The intended use and strength
• Healthcare setting and monitoring requirements
• State or territory supply arrangements

You can expect that pharmacy supply practices will include checks for suitability, interaction risks, and patient safety. If you are ordering online, the pharmacy’s processes may involve identity verification and medication review steps.

This page provides general information and does not replace the advice of a pharmacist or clinician.

Recent guidance and safety updates (general themes)

Guidance for NSAID use continues to emphasise:

• Limiting duration to reduce stomach and bleeding risk
• Avoiding NSAID stacking (taking multiple NSAIDs at once)
• Checking kidney function risk, especially for older adults and those with dehydration
• Evaluating cardiovascular risk for people with existing heart or stroke risk factors
• Ensuring medication reviews when multiple drugs are taken concurrently

Always review your current medicines with a pharmacist if your pain control plan changes.

Delivery, availability and what to expect when ordering online

Availability of ketorolac may vary by product type (oral vs injection), packaging, and current stock levels. When ordering online in Australia, you may see:

• Different pack sizes and strengths
• Variable dispatch times depending on warehouse stock
• Delivery options such as standard or express (depending on location)

Delivery timelines depend on your postcode and the pharmacy’s courier network. If a product is temporarily out of stock, the pharmacy may offer alternatives such as a different formulation or strength where clinically appropriate.

If you have questions about whether ketorolac is suitable for you, or if you want help comparing alternatives, our pharmacists can assist. (Availability of pharmacist support depends on the service model of the website.)

FAQ: Ketorolac (Australia)

1. How quickly does ketorolac work?

Ketorolac typically starts relieving pain within a short period after dosing. Oral onset often occurs within an hour, while injectable forms can act faster in clinical settings. Exact timing varies based on the formulation and your individual factors.

2. Can I take ketorolac with food?

Many people find it easier on the stomach when taken with food. If your product instructions indicate taking with food, follow that advice. Food may slightly delay absorption but usually does not reduce the overall pain-relieving effect.

3. Can I drink alcohol while using ketorolac?

It’s best to avoid alcohol during ketorolac treatment because it can increase stomach irritation and bleeding risk and may worsen side effects.

4. What should I avoid while taking ketorolac?

Avoid:

• Other NSAIDs (ibuprofen, naproxen, diclofenac) unless specifically advised
• Alcohol
• Dehydration (drink fluids as appropriate)
• Taking multiple products that contain similar ingredients (check cold/flu labels)

5. Are there people who should not take ketorolac?

Ketorolac may not be suitable for people with certain conditions (e.g., active or past GI bleeding/ulcer, significant kidney impairment, NSAID allergy, or specific pregnancy stages). Discuss your health history with a pharmacist or clinician before use.

6. What are the signs of serious side effects?

Seek urgent help if you notice black/tarry stools, vomiting blood, severe stomach pain, breathing difficulty, swelling, unusual bruising, reduced urination, or chest pain.

7. Can I switch to another NSAID if ketorolac doesn’t help?

Sometimes another pain strategy may be chosen, but switching NSAIDs still carries similar safety considerations. If pain persists, or if you need more than short-term relief, talk to your healthcare professional for a tailored plan.

8. How long can ketorolac be used?

Ketorolac is generally intended for short-term pain relief. Use duration is limited in many clinical directions to reduce the risk of serious side effects. Follow your product instructions and the guidance provided with your supply.

9. Does ketorolac interact with antidepressants like SSRIs?

Yes. SSRIs can increase bleeding risk when combined with NSAIDs. Your pharmacist can check for interactions with your specific medication list.

10. What should I do if I accidentally take too much ketorolac?

If you suspect an overdose, contact Poison Information Centres immediately or seek urgent medical care. In Australia, you can call 13 11 26 (Poisons Information) for guidance.

Disclaimer

This information is provided to help you understand ketorolac and use it more safely. It is not a substitute for medical advice. If you have questions about your symptoms, dosing suitability, or interactions with your medicines, consult a pharmacist or clinician.