Allday 5000 Side Effects: What to Expect and When to Call Your Dentist

Allday 5000 is a prescription-strength 1.1% sodium fluoride toothpaste used to prevent cavities and protect teeth. Most patients use it without significant issues — but like any medication, it can cause side effects in some people. This guide explains what side effects are possible, which ones are normal, and when to reach out to your dental provider.

Is Allday 5000 Generally Safe?

Yes. Prescription sodium fluoride 1.1% toothpaste — including Allday 5000 — has a well-established safety record when used as directed. It is used topically (on the teeth), and the key safety rule is simple: spit it out and do not swallow. The fluoride concentration is safe for use on teeth but can cause problems if swallowed, especially by children.

Common Side Effects

These side effects have been reported with sodium fluoride 1.1% toothpaste and are generally mild:

Mouth and gum irritation — mild soreness or sensitivity in the gums, particularly in the first week or two of use. This usually resolves on its own.

Excessive salivation — some patients notice increased saliva production, especially right after brushing. This is generally harmless.

Lip inflammation or irritation — mild irritation around the lips can occur, particularly in patients with sensitive skin.

Canker sores (aphthous ulcers) — a small number of patients report mouth sores. Importantly, Allday 5000 is formulated without SLS — a surfactant that is known to increase the frequency of canker sores in susceptible individuals — which is why it may actually reduce this risk compared to SLS-containing toothpastes.

Swelling of the mouth — rare, and should prompt a call to your dentist if it occurs and doesn't resolve quickly.

Rare Side Effects

White patches or staining on teeth — this can occur if the product is used more often than prescribed (e.g., more than once daily for the standard formulation, or more than twice daily for the sensitive version). If you notice white spots developing on your teeth, stop use and contact your dentist.

Temporary staining — some fluoride formulas can cause temporary discoloration of the teeth. This is more commonly associated with stannous fluoride products than sodium fluoride.

What Happens If Allday 5000 Is Accidentally Swallowed?

Accidental ingestion of a small amount — for example, if you inadvertently swallow a tiny residue while brushing — is unlikely to cause harm in most adults. However, swallowing larger amounts can cause:

Nausea and vomiting

Diarrhea and stomach cramps

Burning sensation in the mouth and throat

Excessive salivation (within 30 minutes)

If a child ingests a significant amount of Allday 5000, call Poison Control immediately at 1-800-222-1222. If the ingested amount is large, give milk (which provides soluble calcium to bind fluoride) and seek emergency care. If only a small amount was swallowed, drinking milk or eating a calcium-rich food may help.

Dental Fluorosis: What It Is and Why It Matters for Children

Dental fluorosis is a cosmetic condition that can occur in children under 8 if they regularly ingest too much fluoride during the period when their adult teeth are forming. It appears as white streaks, spots, or, in severe cases, brown staining and pitting of the tooth enamel.

Allday 5000 is not recommended for children under 6 years without dental guidance, because young children often can't spit reliably and may swallow the toothpaste. For children ages 6–16, they should rinse their mouth after using Allday 5000.

When to Call Your Dentist

Contact your dental provider if you notice:

White patches or new spots on your teeth after starting Allday 5000

Significant mouth, gum, or lip irritation that doesn't improve after the first 1–2 weeks

Swelling of the mouth, tongue, or throat (which could indicate an allergic reaction — seek urgent care)

Worsening tooth sensitivity that persists despite use

Gastrointestinal symptoms (nausea, vomiting, stomach pain) after accidental ingestion

Tips to Minimize Side Effects

Always spit out after brushing — do not rinse, eat, or drink for 30 minutes

Use only a thin ribbon of toothpaste — more is not better

Use Allday 5000 in place of your regular toothpaste — not in addition to it

Follow the once-daily (standard) or twice-daily (sensitive) schedule your dentist prescribed

Keep out of reach of children at all times

The Bottom Line

Allday 5000 is safe and well-tolerated for most patients when used as directed. The most important rule is to spit it out rather than swallow. Side effects are generally mild and temporary. If anything concerns you, contact your dental provider. For more on what Allday 5000 is and how it works, see: What Is Allday 5000? Uses, Dosage, and What You Need to Know