Nu-Seals (Acetylsalicylic Acid)

Acetylsalicylic Acid (aspirin) acts on pain, fever and platelet pathways, offering therapeutic benefits across several clinical areas.

• Pain: reduces mild to moderate pain such as headache, muscular aches, and dental discomfort.
• Fever: lowers elevated body temperature in febrile conditions.
• Cardiovascular protection: inhibits platelet aggregation to lower the risk of heart attack and ischemic stroke in at‑risk patients.

• Acetylsalicylic Acid irreversibly inhibits cyclooxygenase‑1 (COX‑1) and cyclooxygenase‑2 (COX‑2) enzymes, preventing the conversion of arachidonic acid to prostaglandins and thromboxane A2. The reduction of prostaglandins diminishes inflammation, pain, and fever, while decreased thromboxane A2 limits platelet aggregation, providing antithrombotic effects.

Acetylsalicylic Acid may cause a range of adverse reactions, from mild to serious.

Common Side Effects

• Gastrointestinal irritation: dyspepsia, heartburn, or mild stomach discomfort.
• Nausea: occasional feeling of queasiness after ingestion.
• Increased bleeding tendency: easy bruising or prolonged bleeding from cuts.
• Headache: mild transient headache in some users.

Serious or Rare Side Effects

• Gastrointestinal ulcer or bleeding: severe stomach or intestinal bleeding requiring medical attention.
• Allergic reactions: rash, angioedema, or anaphylaxis in hypersensitive individuals.
• Reye's syndrome: rare but potentially fatal condition in children with viral infections.
• Severe hepatic or renal impairment: rare organ dysfunction linked to high‑dose or prolonged use.

When using Acetylsalicylic Acid, consider the following safety measures.

• Contraindication: avoid use in patients with known hypersensitivity to aspirin or other NSAIDs.
• Pregnancy: do not use in the third trimester due to risk of fetal complications.
• Breastfeeding: consult a healthcare professional before use while nursing.
• Chronic conditions: use cautiously in individuals with peptic ulcer disease, bleeding disorders, or severe liver/kidney disease.
• Drug interactions: review concomitant medications for potential additive bleeding risk.
• Store at ambient temperature: keep in the original container, protect from moisture and heat.

Acetylsalicylic Acid can interact with several medicines, affecting safety and efficacy.

Major Interactions (Avoid)

• Anticoagulants (e.g., warfarin): increased risk of serious bleeding.
• Other NSAIDs or cyclo‑oxygenase inhibitors: heightened gastrointestinal toxicity.
• Corticosteroids: amplified ulcerogenic potential.
• Selective serotonin reuptake inhibitors (SSRIs): elevated bleeding tendency.
• Alcohol: synergistic effect on gastric mucosal irritation.

Moderate Interactions (Monitor Closely)

• Antihypertensives (e.g., ACE inhibitors, diuretics): may reduce blood pressure control.
• Lithium: possible increase in lithium serum levels.
• Methotrexate: reduced renal clearance leading to toxicity.
• Uric acid‑lowering agents (e.g., allopurinol): may enhance aspirin toxicity.
• Diabetes medications: potential alteration of glycemic control.