PreviDent 5000 is a prescription-strength fluoride toothpaste made by Colgate that contains 1.1% sodium fluoride, delivering 5,000 parts per million (ppm) of fluoride. That’s roughly four times the concentration found in standard over-the-counter toothpaste, which typically contains about 1,350 ppm. Dentists prescribe it for patients at high risk of cavities, particularly those dealing with receding gums, dry mouth, or extensive dental work.
How It Compares to Regular Toothpaste
The key difference is fluoride concentration. A standard tube of Crest or Colgate from the drugstore delivers around 1,000 to 1,350 ppm of fluoride. PreviDent 5000 delivers nearly four times that amount. This higher concentration is what makes it prescription-only: it’s potent enough to actively reverse early tooth decay, not just prevent it.
In a multicenter clinical trial, adults who brushed twice daily with 5,000 ppm fluoride toothpaste showed significantly improved surface hardness on damaged root surfaces compared to those using regular-strength toothpaste. In practical terms, the higher fluoride concentration was able to partially repair tooth surfaces that had already started to break down.
How It Protects Your Teeth
Fluoride works by changing the mineral structure of your enamel. Your teeth are made of a mineral called hydroxyapatite. When fluoride is applied at the surface, it converts hydroxyapatite into fluorapatite, a harder mineral that resists acid attacks from bacteria more effectively. At 5,000 ppm, this conversion happens more aggressively than with regular toothpaste, which is why PreviDent can actually remineralize (rebuild) areas of early decay rather than simply slowing the process down.
Fluoride also interferes with the metabolism of plaque bacteria, reducing their ability to produce the acids that cause cavities in the first place. So it works on two fronts: strengthening the tooth surface and weakening the bacteria attacking it.
Who Gets Prescribed PreviDent 5000
Your dentist will typically prescribe PreviDent 5000 if you fall into a high-risk category for cavities. Common reasons include:
- Root caries: Exposed root surfaces from receding gums are softer than enamel and decay more easily, especially in older adults.
- Dry mouth: Saliva is your mouth’s natural defense against acid. Medications, radiation therapy, or conditions that reduce saliva flow leave teeth vulnerable.
- Extensive dental work: Crowns, bridges, and orthodontic brackets create areas where plaque accumulates and regular toothpaste may not provide enough protection.
- History of frequent cavities: If you’re getting new cavities at every dental visit despite good brushing habits, the extra fluoride can tip the balance.
The product is particularly beneficial for elderly adults, who often face a combination of these risk factors. Receding gums expose vulnerable root surfaces, medications commonly cause dry mouth, and reduced dexterity can make thorough brushing more difficult.
How to Use It
PreviDent 5000 replaces your regular toothpaste for one brushing session per day, usually at bedtime. Apply a thin ribbon to your toothbrush and brush for two minutes. After brushing, spit out the toothpaste but do not eat, drink, or rinse your mouth for 30 minutes. This waiting period is important: it gives the fluoride time to absorb into your enamel. You can continue using your regular toothpaste for your other daily brushings.
Children ages 6 to 16 should rinse their mouth thoroughly after brushing, and they need adult supervision. Children under 6 should not use PreviDent 5000 unless specifically directed by a dentist or doctor.
Available Formulations
PreviDent 5000 comes in several versions, all containing the same 1.1% sodium fluoride. The differences are in the inactive ingredients, tailored to different needs. PreviDent 5000 Enamel Protect is the standard version. PreviDent 5000 Dry Mouth is formulated without sodium lauryl sulfate (SLS), a foaming agent that can irritate already-dry oral tissues. It also contains ingredients like pectin and glycerin to help with moisture. PreviDent 5000 Plus (sometimes called Booster Plus) and a Sensitive version round out the line, with the Sensitive formulation designed for patients who experience pain from hot, cold, or sweet foods.
Your dentist will recommend a specific version based on your situation, but the cavity-fighting power is the same across all of them.
Side Effects and Safety
Allergic reactions to PreviDent 5000 are rare. The main safety concern is accidental swallowing, particularly by children. Swallowing large amounts can cause nausea, vomiting, diarrhea, and abdominal pain, typically within 30 minutes. These symptoms can last up to 24 hours.
For children under 6, prolonged daily ingestion of high-fluoride toothpaste can cause dental fluorosis, a condition where developing permanent teeth form with white spots or, in severe cases, pitting. This risk increases in areas where tap water is already fluoridated above 0.6 ppm. Young children tend to swallow toothpaste rather than spitting it out, which is the primary reason for the age restriction. Children between 6 and 12 should always be supervised during use to make sure they’re spitting properly and not swallowing.
For adults using PreviDent 5000 as directed, the fluoride stays on the tooth surface and the small amount that might be incidentally swallowed is not a concern.