Konvomep Side Effects: What to Expect and When to Call Your Doctor

Konvomep (omeprazole and sodium bicarbonate for oral suspension) is generally well-tolerated, but like all medications, it can cause side effects. Most are mild and go away on their own. A smaller number of side effects are serious and require immediate medical attention. This guide helps you know what to watch for.

Common Side Effects of Konvomep

These side effects were reported in 1% or more of patients taking omeprazole in clinical trials and are considered common. They are usually mild and often improve as your body adjusts to the medication:

Headache — one of the most commonly reported side effects of PPIs including Konvomep

Abdominal pain — stomach discomfort that is usually mild and temporary

Nausea — feeling queasy, especially early in treatment

Diarrhea — loose stools that are usually mild; important to distinguish from serious C. difficile-associated diarrhea (see below)

Vomiting — less common but reported

Flatulence — gas, which may be related to changes in gut bacteria caused by reduced stomach acid

Serious Side Effects and Warnings

The following side effects are less common but require prompt medical attention. Call your doctor immediately if you experience any of these:

Acute tubulointerstitial nephritis (kidney inflammation): Symptoms include blood in the urine, changes in how often you urinate, fever, nausea, rash, or joint pain. Stop Konvomep and contact your doctor right away.

Severe diarrhea (C. difficile): Watery or bloody diarrhea with stomach cramping may indicate Clostridioides difficile (C. diff) infection, which is associated with PPI use. Seek care immediately.

Hypomagnesemia (low magnesium): Long-term PPI use can cause low blood magnesium levels. Symptoms include muscle spasms, irregular heartbeat, tremors, and seizures. Your doctor may monitor magnesium levels during extended therapy.

Bone fractures: Long-term or high-dose PPI use is associated with increased risk of hip, wrist, and spine fractures. Patients at risk for osteoporosis should discuss bone health monitoring with their doctor.

Severe skin reactions: Rare but serious skin reactions including Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) have been reported with PPI use. Seek emergency care if you develop a blistering or peeling rash with fever.

Cutaneous and systemic lupus erythematosus: PPI use has been associated with both drug-induced cutaneous (skin) and systemic lupus. Symptoms can include a butterfly-shaped rash, joint pain, and fever. Usually resolves after discontinuing Konvomep.

Vitamin B-12 deficiency: Long-term PPI therapy may reduce absorption of cyanocobalamin (vitamin B-12). Symptoms of deficiency include fatigue, numbness, and memory problems. Ask your doctor if B-12 monitoring is appropriate.

Side Effects Specific to the Sodium Bicarbonate Component

Because Konvomep contains sodium bicarbonate (526 mg per 40 mg dose), it carries some risks that standard omeprazole capsules do not:

Sodium retention: High sodium intake can cause fluid retention, swelling, and weight gain—particularly in patients with heart failure, kidney disease, or high blood pressure.

Systemic alkalosis: Chronic use of sodium bicarbonate can shift blood pH toward alkaline, which can affect how the body regulates minerals and fluids.

Milk-alkali syndrome: Rarely, concurrent use of bicarbonate with calcium or milk products can cause this syndrome, marked by high blood calcium and kidney problems.

Allergic Reactions: When to Seek Emergency Care

Get emergency medical help immediately if you have signs of a severe allergic reaction: hives, difficulty breathing, or swelling of your face, lips, tongue, or throat (anaphylaxis). Konvomep is contraindicated in patients with known hypersensitivity to omeprazole or other proton pump inhibitors (substituted benzimidazoles).

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Minimizing Your Risk of Side Effects

Take Konvomep only for as long as prescribed—short-term use (4–8 weeks) minimizes long-term risks

Tell your doctor if you have heart failure, kidney disease, or are on a sodium-restricted diet

Report any new symptoms to your doctor promptly—don't wait for your next scheduled appointment

If you take clopidogrel (Plavix) for heart disease, tell your doctor before starting Konvomep—this combination should generally be avoided

Finding Konvomep and Managing Your Treatment

If you've been prescribed Konvomep and are having trouble finding it, medfinder can help. medfinder calls pharmacies near you to find which ones have Konvomep in stock, so you can focus on your health instead of pharmacy hunting.

Also review our full guide on Konvomep drug interactions to make sure your other medications are compatible.