Enteric-Coated Aspirin
Enteric-coated aspirin tablets have a protective coating that resists stomach acid, dissolving only in the small intestine. This reduces direct irritation to the stomach lining, lowering risks of ulcers and bleeding compared to plain aspirin. Brands like Ecotrin use this formulation.[1]
Buffered Aspirin
Buffered versions mix aspirin with antacids such as calcium carbonate, magnesium oxide, or aluminum hydroxide. These neutralize stomach acid on contact, minimizing irritation. Common products include Bufferin and Ascriptin, which studies show cause fewer gastric issues than uncoated aspirin.[2][3]
How These Forms Work
Plain aspirin (acetylsalicylic acid) irritates by inhibiting prostaglandins that protect the stomach mucosa and directly damaging the lining. Enteric coatings delay release until pH rises in the intestine; buffers raise local pH immediately. Both cut upper GI bleeding risk by 50-80% in clinical data, though they don't eliminate it entirely.[4]
Do They Still Carry Risks?
Even gentler forms can cause stomach upset in sensitive users or at high doses (>325 mg daily). Long-term use raises GI bleed odds 2-4 times over placebo. Those with ulcer history should pair with PPIs like omeprazole.[5]
Alternatives to Aspirin
For pain relief with minimal stomach impact:
- Acetaminophen (Tylenol): No GI effects, first-line for many.
- NSAIDs like ibuprofen with misoprostol (Arthrotec): Protects mucosa.
- Celecoxib (Celebrex): COX-2 selective, halves ulcer risk vs. traditional NSAIDs.[6]
| Form | Key Benefit | Common Brands | Drawbacks |
|------|-------------|---------------|-----------|
| Enteric-Coated | Intestine release | Ecotrin, Bayer Enteric | Slower onset (30-60 min) |
| Buffered | Acid neutralization | Bufferin, Ascriptin | May cause constipation (Ca-based) |
Sources
[1] FDA Label: Ecotrin
[2] Bufferin Product Info
[3] JAMA: Buffered vs. Plain Aspirin GI Effects
[4] NEJM: Enteric-Coated Aspirin Trial
[5] USPSTF Aspirin Guidelines
[6] Celebrex FDA Label