When I look at the pharmacy counter here on Vine Street, heartburn medications take up a surprising amount of shelf space. And I get why — between the late-night tacos after a show at the Pantages and the stress that seems to come standard with LA living, a lot of folks deal with acid reflux. But standing in that aisle trying to choose between Tums, Pepcid, and Prilosec can feel overwhelming.
The good news? Once you understand how these three types of medications work, the choice becomes much clearer.
The Three Types of Heartburn Relief
Let's break this down by how fast they work and how they actually stop the burn.
Antacids (Tums, Rolaids, Maalox) work in seconds. They're basically chalk — calcium carbonate or magnesium hydroxide — that neutralizes stomach acid on contact. Think of them as dumping baking soda on a fire. Fast, but temporary.
H2 Blockers (Pepcid, Zantac 360, Tagamet) take 30–60 minutes to kick in, but they last 6–12 hours. They reduce how much acid your stomach produces by blocking histamine receptors. (Yes, the same histamine involved in allergies — your stomach uses it differently.)
Proton Pump Inhibitors or PPIs (Prilosec, Nexium, Prevacid) are the heavyweights. They take 1–4 days to reach full effect, but they can shut down acid production for 24 hours with a single dose. They literally block the "pump" in your stomach cells that makes acid.
Matching the Medicine to Your Situation
Here's how I usually help people decide:
You ate too much pizza and need relief NOW
Antacids are your friend. Keep a roll of Tums in your car, your desk drawer, wherever. They work immediately, they're cheap, and they're safe for occasional use. The catch? They only last 30–60 minutes. If you're reaching for them daily, we need to talk about something stronger.You get heartburn a few times a week, often at predictable times
An H2 blocker like Pepcid AC is probably your sweet spot. You can take it 30–60 minutes before the meal that usually triggers your symptoms (Thai food, coffee, that breakfast burrito from the food truck on Highland). One dose gives you protection for most of the day. A lot of people also take one at bedtime if nighttime heartburn is their issue.You have heartburn most days, or it wakes you up at night
This is when we start thinking about PPIs. Prilosec OTC (omeprazole) or Nexium 24HR (esomeprazole) taken once daily, usually before breakfast, can give you consistent control. But here's the thing: if you need a PPI, you really should talk to your doctor first. Frequent heartburn can signal something that needs evaluation — GERD, a hiatal hernia, or other issues that deserve attention.The Fine Print Nobody Tells You
Timing matters for PPIs. Take them 30–60 minutes before your first meal of the day, not at bedtime. They need food coming into your stomach to work properly.
H2 blockers can lose effectiveness. If you take them daily for months, your body sometimes adapts. PPIs don't have this problem.
Antacids can interfere with other medications. They bind to certain antibiotics, thyroid meds, and more. If you're on other prescriptions, check with us before making antacids your daily routine.
None of these address the root cause. Weight loss, avoiding trigger foods, not eating within 3 hours of bedtime, raising the head of your bed — these changes actually prevent acid reflux. The medications just manage symptoms.
When to Stop Self-Treating
If you've been using OTC heartburn meds for more than two weeks with no improvement, or if you're experiencing difficulty swallowing, unintentional weight loss, or black stools — stop reading this blog post and call your doctor.
The Bottom Line
For occasional heartburn, grab the antacids. For predictable, weekly heartburn, try an H2 blocker. For daily symptoms, consider a PPI but talk to your doctor first.
I know the walk-in clinic down the street from us can have long waits, especially mid-afternoon. If you're trying to figure out which heartburn medication makes sense for your pattern of symptoms, stop by the pharmacy. We're here Monday through Friday, usually pretty quiet around 10 AM, and a quick consultation at the counter doesn't cost you anything. We've been doing this for over 20 years — chances are I've heard your exact question before.