Ketorolac

Short-Term Pain Relief

Ketorolac is used to manage moderately severe acute pain. It is typically prescribed for pain that is intense enough to require strong medication, often providing a level of relief similar to opioid medications. It is most frequently used in the following situations:

• Recovery immediately following surgical procedures.
• Management of sudden, intense pain that is expected to be temporary.

Usage Limitations

Ketorolac is not intended for all types of pain and has specific restrictions on how it is used:

• Duration: It is strictly for short-term use, generally for a maximum of 5 days. Using it longer increases the risk of serious complications.
• Pain Type: It is not used for minor aches or pains.
• Chronic Conditions: It is not appropriate for long-term pain management, such as treating arthritis.

Treatment usually begins with an injection (intravenous or intramuscular) administered by a healthcare professional. If continued treatment is necessary, it may be followed by oral tablets for the remainder of the 5-day limit.

Mechanism of Action

Ketorolac belongs to a class of medications called nonsteroidal anti-inflammatory drugs (NSAIDs). It works by blocking the body's production of certain natural substances that cause pain, fever, and inflammation.

The medication primarily functions by inhibiting enzymes known as cyclooxygenase (COX). These enzymes are responsible for the synthesis of prostaglandins, which are hormone-like chemicals released at sites of tissue damage or infection. Prostaglandins play a key role in:

• Signaling pain to the brain
• Causing inflammation and swelling
• Increasing body temperature (fever)

By reducing the levels of these chemicals, ketorolac helps decrease pain and inflammation. Although it is a potent analgesic used for moderately severe pain, it is not a narcotic and works differently than opioid pain medications.

Common Side Effects

Some people may experience mild side effects while taking ketorolac. These often include:

• Headache or dizziness
• Drowsiness
• Nausea, vomiting, or stomach pain
• Indigestion, gas, or constipation
• Diarrhea
• Sweating
• Sores in the mouth

Serious Side Effects

Ketorolac can cause severe reactions that require immediate medical attention. Contact a healthcare provider right away if you experience:

• Signs of an allergic reaction, such as skin rash, hives, itching, or swelling of the face, lips, tongue, or throat
• Shortness of breath or difficulty breathing
• Chest pain, fast heartbeat, or sudden weakness on one side of the body
• Slurred speech or vision changes
• Severe stomach pain, black or tarry stools, or vomiting blood
• Yellowing of the skin or eyes (jaundice), dark urine, or pain in the upper right stomach area
• Swelling of the arms, legs, hands, or feet, or unexplained weight gain
• Cloudy, bloody, or painful urination, or a decrease in how often you urinate
• Fever, blisters, or peeling skin
• Extreme tiredness or flu-like symptoms

Boxed Warnings

Ketorolac has several boxed warnings, which are the most serious warnings issued by the FDA. These include:

• Cardiovascular Risk: This medication may increase the risk of serious heart attacks or strokes, which can be fatal. This risk may increase with longer use or in patients with existing heart disease.
• Gastrointestinal Risk: Ketorolac can cause severe bleeding, ulceration, and perforation of the stomach or intestines. These conditions can occur without warning and may be fatal, especially in elderly patients.
• Duration of Use: The total duration of ketorolac use (including oral, injectable, or nasal forms) must not exceed five days. It is not intended for long-term or chronic pain.
• Renal Risk: Ketorolac is contraindicated in patients with advanced kidney disease or those at risk for kidney failure due to fluid loss.
• Bleeding Risk: Because it inhibits platelet function, it is contraindicated in patients with active bleeding or those at high risk of bleeding after surgery.

Contraindications

Ketorolac should not be used in individuals with certain medical conditions or histories, including:

• Active peptic ulcer disease or a history of gastrointestinal bleeding or perforation.
• A history of asthma, hives, or other allergic-type reactions after taking aspirin or other nonsteroidal anti-inflammatory drugs (NSAIDs).
• Use as a preventive treatment before major surgery or during the period around coronary artery bypass graft (CABG) surgery.
• Labor and delivery, as it may affect fetal circulation and uterine contractions.
• Nursing mothers, due to the potential for adverse effects on the infant.

Other Precautions

Fluid Retention and Edema: Ketorolac may cause fluid retention and swelling. It should be used with caution in patients with heart failure or high blood pressure.

Liver Effects: Elevations in liver enzymes may occur. Patients should be monitored for signs of liver dysfunction, such as yellowing of the skin or eyes (jaundice) and nausea.

Anaphylactoid Reactions: Serious allergic reactions can occur even in patients with no prior exposure to the drug. Immediate medical attention is required if swelling of the face or throat, skin rash, or difficulty breathing occurs.

Elderly Patients: Older adults are at a higher risk for severe side effects, particularly gastrointestinal bleeding and kidney problems. Lower doses are often recommended for patients over age 65.

Pregnancy

Ketorolac is a nonsteroidal anti-inflammatory drug (NSAID). Healthcare providers generally advise against using NSAIDs starting at 20 weeks of pregnancy because they can cause rare but serious kidney problems in the unborn baby, which may lead to low levels of amniotic fluid. If use is necessary between 20 and 30 weeks, it is typically limited to the lowest dose for the shortest duration possible.

Using ketorolac at 30 weeks of pregnancy or later is specifically avoided because it can cause premature closure of a blood vessel in the baby's heart (the ductus arteriosus). Additionally, ketorolac is not recommended for use during labor or delivery, as it may negatively affect fetal circulation and can inhibit the uterine contractions necessary for childbirth.

Breastfeeding

Ketorolac is excreted into human milk in small amounts. Because of the potential for adverse reactions in nursing infants, the benefits of the drug to the mother must be weighed against the potential risks to the child. Individuals who are breastfeeding should consult with their healthcare provider to determine if ketorolac is appropriate for their situation.

Oral Formulations

Ketorolac is available as an oral tablet. This form is typically used as a continuation of treatment after an initial dose has been administered by injection.

Injectable Formulations

This medication is available as a solution for injection. It is administered by a healthcare professional either into a muscle or directly into a vein.

Nasal Formulations

Ketorolac is available as a nasal spray for the short-term management of moderate to severe pain.

Ophthalmic Formulations

Ketorolac is also available as an ophthalmic solution, or eye drops, which are used to treat pain and inflammation following certain eye surgeries.

FDA Approval and Indications

Ketorolac is approved by the U.S. Food and Drug Administration (FDA) for the short-term management of moderately severe acute pain that would otherwise require opioid-level analgesia. It is intended for use in adults and is not indicated for minor or chronic pain conditions.

Boxed Warnings

The FDA requires a boxed warning for ketorolac due to the risk of several serious adverse events. These warnings include:

• Gastrointestinal Risks: Ketorolac can cause serious gastrointestinal inflammation, bleeding, ulceration, and perforation of the stomach or intestines, which can be fatal. These events can occur at any time during use and without warning symptoms.
• Cardiovascular Risks: Like other nonsteroidal anti-inflammatory drugs (NSAIDs), ketorolac may increase the risk of serious cardiovascular thrombotic events, myocardial infarction (heart attack), and stroke.
• Renal Risks: The medication is contraindicated in patients with advanced renal impairment and those at risk for renal failure due to volume depletion.
• Risk of Bleeding: Ketorolac inhibits platelet function and is contraindicated in patients with suspected or confirmed cerebrovascular bleeding or those at high risk of bleeding.
• Labor and Delivery: It is contraindicated for use during labor and delivery because it may adversely affect fetal circulation and inhibit uterine contractions.

Duration of Use

Regulatory guidelines strictly limit the use of ketorolac to a maximum of five days. This includes the combined duration of treatment using injectable, oral, or nasal spray forms. Exceeding this timeframe significantly increases the risk of serious side effects, particularly gastrointestinal bleeding and kidney damage.

Increased Risk of Stomach Bleeding

Ketorolac is a potent nonsteroidal anti-inflammatory drug (NSAID). Like other medications in this class, it carries a risk of causing serious gastrointestinal side effects, including inflammation, bleeding, ulceration, and perforation of the stomach or intestines. These conditions can occur without warning and may be fatal.

Consuming alcohol while taking ketorolac further increases the risk of developing these stomach problems. To reduce the chance of severe complications, it is generally recommended to avoid alcohol during treatment.

Factors That Increase Risk

• Regular or heavy alcohol consumption.
• A history of stomach ulcers or gastrointestinal bleeding.
• Using ketorolac for longer than the recommended five-day maximum.
• Taking other medications that also increase bleeding risk, such as anticoagulants or other NSAIDs.

If you experience symptoms of stomach bleeding, such as black, tarry, or bloody stools, or vomit that looks like coffee grounds, seek medical attention immediately.