Ace Duo200 mg+500 mg

Ace Duo is a fixed-dose combination analgesic and antipyretic used for the short-term relief of mild to moderate pain and fever.

Established/Approved Uses

• Relief of mild to moderate acute pain, including headache, toothache, backache, musculoskeletal pain, and minor arthritis-related pain
• Relief of pain associated with the common cold and flu-like symptoms
• Reduction of fever
• Postoperative and post-traumatic pain (e.g., after dental extraction or minor surgery)
• Primary dysmenorrhea (menstrual pain)

Guideline-Supported / Adjunct Uses

• As part of a multimodal (combination) analgesic strategy for moderate postoperative pain, where Ace Duo is used together with other pain-management measures under medical supervision

Note: Ace Duo is intended for short-term symptomatic use only; it is not indicated for treating the underlying cause of pain, inflammation, or fever.

Each tablet/capsule of Ibuprofen + Paracetamol contains Ibuprofen (an NSAID) and Paracetamol (Acetaminophen) as a fixed-dose combination. Commercially available strengths commonly include Ibuprofen 400 mg + Paracetamol 325 mg, and lower-strength Ibuprofen 125 mg + Paracetamol 250 mg formulations; the exact strength varies by product and should be confirmed on the product label.

Ace Duo combines two analgesic/antipyretic agents that act through complementary mechanisms. Ibuprofen is a propionic acid derivative non-steroidal anti-inflammatory drug (NSAID), and Paracetamol (acetaminophen) is a centrally-acting analgesic and antipyretic. When combined, Ace Duo is used to provide effective relief of mild to moderate pain and fever, and available evidence suggests the combination may provide greater or more consistent analgesia than either agent alone at comparable doses.

Ace Duo belongs to the therapeutic class of Non-Opioid Analgesic and Antipyretic combinations - specifically a Non-Steroidal Anti-Inflammatory Drug (NSAID) combined with a non-NSAID analgesic/antipyretic (para-aminophenol derivative).

Mechanism of Action

Ibuprofen + Paracetamol exerts its effect through the combined actions of its two components:

• Ibuprofen non-selectively inhibits cyclo-oxygenase (COX-1 and COX-2) enzymes, reducing peripheral synthesis of prostaglandins that mediate pain, inflammation, and fever.
• Paracetamol is thought to act predominantly within the central nervous system, with proposed mechanisms including weak inhibition of central prostaglandin synthesis and modulation of descending serotonergic pain pathways; it has minimal peripheral anti-inflammatory activity.

Pharmacokinetics

Both components of Ibuprofen + Paracetamol are rapidly absorbed after oral administration, reaching peak plasma concentrations within approximately 1-2 hours. Ibuprofen is highly protein-bound (~99%) and metabolized hepatically, with a half-life of about 2 hours. Paracetamol is metabolized mainly by hepatic glucuronidation and sulfation, with a small fraction forming a hepatotoxic metabolite (NAPQI) that is normally detoxified by glutathione; its half-life is approximately 2-3 hours. Both components are primarily excreted renally as metabolites.

Ace Duo should be taken orally, preferably with food or milk to minimize gastrointestinal upset. Tablets should be swallowed whole with a glass of water and should not be crushed or chewed unless the product is specifically formulated as a chewable or dispersible tablet. Avoid lying down for at least 10 minutes after taking a dose. Doses should be spaced at least 6 hours apart.

Clinically Significant Interactions

• Anticoagulants (e.g., warfarin): The ibuprofen component of Ace Duo increases the risk of gastrointestinal bleeding and may potentiate anticoagulant effect; concurrent use requires caution and monitoring.
• Other NSAIDs or aspirin: Concurrent use with other NSAIDs or aspirin increases the risk of gastrointestinal ulceration and bleeding without added benefit and should be avoided.
• ACE inhibitors, ARBs, and diuretics: The ibuprofen component may reduce antihypertensive/diuretic effect and increase the risk of acute kidney injury, particularly in elderly or volume-depleted patients ("triple whammy" effect).
• Corticosteroids: Increased risk of gastrointestinal ulceration and bleeding.
• Methotrexate: The ibuprofen component may reduce renal clearance of methotrexate, increasing its toxicity, particularly at higher methotrexate doses.
• Lithium: The ibuprofen component may reduce renal lithium clearance, increasing serum lithium levels and toxicity risk.
• Alcohol: Increases the risk of gastrointestinal bleeding (ibuprofen component) and hepatotoxicity (paracetamol component); avoid or limit alcohol use while taking Ace Duo.
• Other paracetamol- or ibuprofen-containing products: Concurrent use of other over-the-counter cold, flu, or pain products containing paracetamol or an NSAID increases the risk of inadvertent overdose and should be avoided.

Common

• Nausea, dyspepsia, abdominal pain, or heartburn
• Dizziness or headache
• Diarrhea or constipation

Less Common / Serious

• Gastrointestinal ulceration or bleeding
• Skin rash or hypersensitivity reactions
• Fluid retention, edema, or elevated blood pressure
• Renal impairment
• Hepatotoxicity (typically associated with overdose of the paracetamol component; see Overdose Effects)
• Rarely, serious skin reactions (e.g., Stevens-Johnson syndrome), anaphylaxis, or cardiovascular thrombotic events (myocardial infarction, stroke)

Patients taking Ace Duo should seek prompt medical attention for signs of gastrointestinal bleeding (black stools, vomiting blood), severe skin reactions, or signs of liver injury (jaundice, dark urine).

Pregnancy

Ace Duo is contraindicated during the third trimester of pregnancy due to the risk of premature closure of the fetal ductus arteriosus and other fetal/neonatal complications associated with NSAID use late in pregnancy. Use during the first and second trimesters, and especially from around 20 weeks of gestation onward, should be avoided unless clearly necessary; if considered necessary, Ace Duo should be used at the lowest effective dose for the shortest possible duration and only after consulting a physician, since NSAID use in pregnancy has been associated with fetal renal effects and reduced amniotic fluid (oligohydramnios) with prolonged use.

Lactation

Both paracetamol and ibuprofen pass into breast milk in small amounts and are generally considered compatible with breastfeeding when used at recommended doses for short durations; however, because Ace Duo is a fixed-dose combination product, it should be used during breastfeeding only if clearly needed and after consulting a physician.

Ace Duo should be used with caution in the following situations:

• Hepatotoxicity risk: Do not exceed the maximum recommended daily dose of paracetamol from all sources; overdose can cause severe, potentially fatal liver damage. Avoid concurrent use of other paracetamol-containing products and limit alcohol intake.
• Gastrointestinal risk: The ibuprofen component may cause peptic ulceration, bleeding, or perforation, which can occur without warning symptoms, especially in the elderly or those with a history of peptic ulcer disease.
• Cardiovascular risk: NSAIDs, including the ibuprofen component, may increase the risk of serious cardiovascular thrombotic events, myocardial infarction, and stroke, which can be fatal; this risk may increase with duration of use and in patients with cardiovascular disease or risk factors.
• Renal risk: Use with caution in patients with pre-existing renal impairment, dehydration, heart failure, or those taking diuretics or ACE inhibitors/ARBs, as NSAIDs can cause fluid retention and worsen renal function.
• Avoid duplicate therapy: Do not take Ace Duo with other NSAID- or paracetamol-containing products to avoid inadvertent overdose.
• Use the lowest effective dose for the shortest duration necessary.

Overdose of Ace Duo is a medical emergency. Paracetamol overdose may cause serious, potentially fatal liver damage, which may not become apparent for 24-48 hours; early symptoms can be nonspecific (nausea, vomiting, sweating, malaise) or absent. Ibuprofen overdose may cause nausea, vomiting, abdominal pain, drowsiness, gastrointestinal bleeding, and in severe cases, renal impairment, metabolic acidosis, or central nervous system depression. If an overdose of Ace Duo is suspected, seek immediate medical attention or contact a poison control center/emergency services right away, even if the patient appears well, as prompt treatment (including specific antidotal therapy for paracetamol) can prevent serious harm.

Store at room temperature (below 30°C), away from light and moisture. Keep out of reach of children.

Elderly

Elderly patients are at increased risk of gastrointestinal, renal, and cardiovascular adverse effects with the ibuprofen component of Ace Duo; use the lowest effective dose for the shortest duration.

Hepatic Impairment

Use Ace Duo with caution and at a reduced dose in mild-to-moderate hepatic impairment; it is contraindicated in severe hepatic impairment.

Renal Impairment

Use Ace Duo with caution and at a reduced dose in mild-to-moderate renal impairment; it is contraindicated in severe renal impairment.

Pediatric

See Pediatric Uses.

Ace Duo is intended for short-term use, typically not exceeding 3-5 days for pain or fever, unless otherwise directed by a physician. If pain or fever persists beyond this period, worsens, or is accompanied by other concerning symptoms, medical advice should be sought.

Ibuprofen + Paracetamol is classified as a Non-Steroidal Anti-Inflammatory Drug (NSAID) combined with a Non-opioid Analgesic/Antipyretic (para-aminophenol derivative).

Ibuprofen + Paracetamol acts through dual, complementary mechanisms: the ibuprofen component inhibits peripheral cyclo-oxygenase (COX-1/COX-2) enzymes to reduce prostaglandin-mediated pain, inflammation, and fever, while the paracetamol component acts centrally to reduce pain perception and fever, with proposed mechanisms including modulation of central prostaglandin synthesis and descending pain pathways. The combined action of Ibuprofen + Paracetamol is thought to provide more effective analgesia than either component alone at comparable doses.

Category C (1st and 2nd trimester); Category D (3rd trimester) - based on the ibuprofen (NSAID) component; contraindicated in the third trimester of pregnancy

Fixed-dose Ace Duo combination products are generally not recommended for children under 12 years of age, as the safety and efficacy of the fixed combination have not been well established in this age group. Where pain or fever relief is needed in younger children, ibuprofen and paracetamol are typically dosed separately using age- and weight-based pediatric dosing under medical or pharmacist guidance. In adolescents 12 years and older, use of Ace Duo should follow product-specific labeling and be supervised by a physician or pharmacist.