Acid Reflux Medications

PPIs, H2 blockers, and antacids compared — how they work, what they cost, and how long it's safe to take them.

The Three Categories

Type How It Works Onset Best For
Antacids Neutralize existing acid Minutes Quick relief, occasional symptoms
H2 Blockers Block histamine acid signal 30-60 min Moderate symptoms, nighttime
PPIs Shut down proton pumps 1-4 days Frequent/severe, esophageal damage

Antacids

The simplest option. Calcium carbonate (Tums), magnesium hydroxide (Milk of Magnesia), and aluminum/magnesium combos (Maalox, Mylanta). They neutralize acid that's already been produced.

Tums Calcium carbonate $4-8/bottle
Rolaids Calcium + magnesium $5-9/bottle
Gaviscon Alginate + antacid $8-12/bottle

Limitations: Short-duration relief (1-2 hours). Not effective for frequent symptoms. High-dose calcium antacids can cause constipation or rebound acid production.

H2 Receptor Blockers

The middle tier. H2 blockers reduce acid production by blocking the histamine receptors on stomach cells. Less powerful than PPIs but with fewer long-term concerns.

Famotidine (Pepcid)

The go-to H2 blocker. OTC: 20mg, Rx: 40mg. Take 15-60 min before meals. Particularly effective for nighttime reflux at bedtime.

$4-15/month generic
Cimetidine (Tagamet)

The original H2 blocker. Less commonly used now due to more drug interactions than famotidine. Still effective if famotidine doesn't work for you.

$5-12/month generic

Note: H2 blockers can lose effectiveness over time (tolerance). Some doctors recommend alternating with other approaches.

Proton Pump Inhibitors (PPIs)

The strongest acid suppressors available. PPIs block the proton pumps in stomach cells that produce acid. They take 1-4 days to reach full effect but provide the most complete symptom control.

Omeprazole Prilosec $4-15/mo
Esomeprazole Nexium $8-20/mo
Pantoprazole Protonix $8-18/mo
Lansoprazole Prevacid $10-25/mo
Rabeprazole Aciphex $15-30/mo
Dexlansoprazole Dexilant $30-60/mo

PPI Safety — What the Research Actually Says

You've probably read alarming headlines about PPI risks. Here's the context:

  • Bone density: Observational studies show a small increase in fracture risk with long-term use. Effect size is modest. Calcium and vitamin D supplementation may mitigate.
  • Kidney: Some association with chronic kidney disease in long-term users. Absolute risk increase is small.
  • Gut infections: Reduced acid may slightly increase risk of C. diff and other GI infections.
  • B12 and magnesium: Long-term PPI use can reduce absorption. Your doctor may monitor levels.

The takeaway: PPIs are not risk-free, but for people who need them, the benefits generally outweigh the risks. The key is using them at the lowest effective dose for the shortest necessary time. Talk to your doctor about periodic reassessment.

Save on Prescriptions

Generic PPIs cost a fraction of brand-name. Omeprazole runs $4-15/month vs $20-40+ for Prilosec OTC. Check RxSaver.ai for current prices at pharmacies near you.

Safety Note

Never start, stop, or switch medications without consulting your doctor. Over-the-counter availability does not mean a medication is appropriate for everyone or risk-free.

All Treatment Options What It Costs

Frequently Asked Questions

Short answer: 4-8 weeks is the standard course. After that, it depends. Some people with erosive esophagitis or Barrett's esophagus genuinely need longer-term use, and that's fine with monitoring. The concerns you've probably read about (bone density, magnesium, kidney issues) come from observational studies, and the actual risk increase is small. But "small risk" isn't "no risk," so the real answer is: work with your doctor to figure out if you still need them, and use the lowest effective dose.
Yes, but don't take them at the exact same moment. Here's why: omeprazole blocks acid production but takes 1-4 days to fully kick in. Tums neutralize acid that's already there and work in minutes. So taking Tums for quick relief while your PPI ramps up makes total sense. Just space them out. Take your omeprazole 30-60 minutes before breakfast like you're supposed to, and save the Tums for breakthrough symptoms later.
They both reduce stomach acid, just differently. PPIs (omeprazole, pantoprazole) shut down the proton pumps that actually produce acid. Strongest option available. H2 blockers (famotidine is the main one now) block the histamine signal that tells your stomach to make acid. Effective but not as powerful. PPIs are better for healing damage to the esophagus. H2 blockers are good for nighttime symptoms and don't carry the same long-term use concerns. A lot of people do well starting with an H2 blocker and stepping up to a PPI only if needed.
Yes. Same active ingredient, same dose, and the FDA requires generics to prove they work the same way in your body. Generic omeprazole is Prilosec. Generic pantoprazole is Protonix. The only real difference is price: generic omeprazole runs about $4-15 a month at most pharmacies, while brand-name can be $20-40+. There's no medical reason to pay more for the brand name. Check RxSaver.ai to compare prices at pharmacies near you.
GERD Dr. AI
Acid Reflux Specialist
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