The white pill imprinted with L374 is a combination over-the-counter (OTC) pain reliever containing Acetaminophen 250 mg, Aspirin 250 mg, and Caffeine 65 mg. It is a generic store-brand equivalent of brand-name products such as Excedrin Extra Strength or Excedrin Migraine.
Pill Identification
Attribute – Visual / Clinical Properties
- Imprint –
L374on one side, plain on the reverse - Color & Shape – White, capsule-shaped / oblong tablet (caplet)
- Active Ingredients – Acetaminophen 250 mg / Aspirin (NSAID) 250 mg / Caffeine 65 mg
- Drug Class – Combination Analgesic / Antipyretic / Vascular Constrictor
- Availability – Over-the-counter (OTC) / Non-controlled drug |
Mechanism of Action
The combination relies on three active agents working synergistically to alleviate pain, particularly headaches and migraines:
- Acetaminophen (Analgesic/Antipyretic): Inhibits prostaglandin synthesis in the central nervous system (CNS) and elevates the pain threshold.
- Aspirin (Nonsteroidal Anti-inflammatory Drug – NSAID): Irreversibly inhibits the cyclooxygenase enzymes, blocking peripheral prostaglandin production to reduce inflammation, vascular throbbing, and pain transmission.
- Caffeine (Central Nervous System Stimulant): Acts as an adenosine receptor antagonist. It constricts dilated cerebral blood vessels (a major cause of headache pain) and enhances the analgesic efficacy of acetaminophen and aspirin by up to 40%.
Indications and Dosing Guidelines
This medication is indicated for the temporary relief of minor aches and pains associated with headaches, migraines, sinusitis, colds, muscular aches, toothaches, menstrual cramps, and arthritis.
- Adults and Children 12 Years and Older: Take 2 caplets every 6 hours with a full glass of water while symptoms persist.
- Maximum Daily Dose: Do not exceed 8 caplets in 24 hours unless directed by a doctor.
- Children Under 12 Years: Ask a doctor before use.
- Crucial Rule: Always take this medication with food or milk if stomach upset occurs, and never take it for more than 10 consecutive days for pain or 3 days for fever without consulting a healthcare provider.
Side Effects
Common Adverse Effects
- Gastrointestinal: Heartburn, upset stomach, mild nausea.
- Neurological / CNS: Nervousness, restlessness, irritability, insomnia, or jitters (due to caffeine content).
Serious Adverse Effects
- Gastrointestinal Bleeding: Severe abdominal pain, vomiting blood or material resembling coffee grounds, black or tarry stools.
- Hepatotoxicity: Jaundice (yellowing of eyes or skin), dark urine, unusual fatigue.
- Allergic Reactions: Hives, facial swelling, asthma/wheezing, or shock.
- Tinnitus: Ringing in the ears or temporary loss of hearing (a hallmark sign of aspirin/salicylate toxicity).
Precautions and Boxed Warnings
Severe Liver Damage Warning (Acetaminophen)
Acetaminophen can cause severe or fatal liver damage if you take:
- More than 4,000 mg of acetaminophen in 24 hours (including other acetaminophen-containing prescription or OTC medicines).
- 3 or more alcoholic drinks every day while using this product.
Stomach Bleeding Warning (Aspirin)
Aspirin (an NSAID) carries a risk of severe stomach bleeding. The risk is higher if you:
- Are age 60 or older.
- Have had stomach ulcers or bleeding problems.
- Take blood thinners (e.g., warfarin, apixaban) or steroid medications.
- Take other drugs containing NSAIDs (ibuprofen, naproxen, aspirin).
- Consume 3 or more alcoholic beverages daily while taking the product.
Reye’s Syndrome Warning (Children & Teenagers)
- Do NOT give this medication to children or teenagers recovering from chickenpox or flu-like symptoms. Aspirin is strongly linked to Reye’s syndrome, a rare but fatal condition causing acute encephalopathy and fatty liver failure.
Pregnancy & Nursing Precautions
- Third Trimester: Do NOT take aspirin-containing products during the last 3 months of pregnancy unless specifically directed by a physician, as it may cause heart or kidney complications in the unborn child or complications during delivery.
- Lactation: Caffeine and salicylates pass into breast milk; consult a physician before use.