CMC Luvis0.5%

CMC Luvis (also known as sodium carboxymethylcellulose) is primarily used as an ophthalmic lubricant.

Established / OTC monograph uses

• Dry eye symptoms (temporary relief): CMC Luvis ophthalmic solution is used for temporary relief of burning, irritation, and discomfort due to dryness of the eye.
• Ocular surface protectant: CMC Luvis acts as a protectant against further irritation and helps relieve dryness caused by exposure to wind or sun, or reduced blinking (e.g., prolonged screen use).

Other established uses (formulation-dependent)

• Oral/dental protective paste: In paste form, CMC Luvis is used as a protective coating over mouth ulcers, minor oral lesions, and denture-related sores.
• Bulk-forming laxative component: In some oral formulations, CMC Luvis is included as a bulk-forming agent to help relieve occasional constipation, usually as part of a combination fiber product.

CMC Luvis is not intended to treat the underlying cause of dry eye disease or to treat infection or inflammation of the eye.

Formulations of Carmellose Sodium vary by brand and dosage form. Ophthalmic solutions typically contain Carmellose Sodium 0.5% to 1% w/v as the active ingredient, with excipients such as sodium chloride and purified water; some formulations contain a preservative (e.g., benzalkonium chloride) while single-use preservative-free vials do not. Oral/dental pastes and bulk-forming products contain Carmellose Sodium as the primary functional ingredient, combined with other protectant or fiber components depending on the specific brand.

CMC Luvis is the sodium salt of carboxymethylcellulose, a water-soluble, semi-synthetic cellulose derivative. It is a viscosity-increasing, mucoadhesive polymer widely used in pharmaceutical formulations as a lubricant, protectant, and thickening agent. In ophthalmology, CMC Luvis is formulated as artificial tears to supplement the eye's natural tear film. In other formulations, CMC Luvis is used as a protective barrier for oral mucosal lesions or as a bulk-forming agent in the gastrointestinal tract.

CMC Luvis belongs to the class of ophthalmic lubricants/artificial tear substitutes (ocular surface protectants). Depending on formulation, it is also classified as an oral mucosal protectant and as a bulk-forming laxative component.

Carmellose Sodium is a hydrophilic polymer that, when applied to the eye, increases the viscosity and stability of the tear film, prolongs ocular surface contact time, and reduces friction between the eyelid and cornea during blinking, relieving symptoms of dryness, burning, and irritation without altering normal tear production. Carmellose Sodium is not significantly absorbed systemically when used ophthalmically or as an oral mucosal protectant. When used as a bulk-forming laxative component, Carmellose Sodium absorbs water in the intestinal lumen, increasing stool bulk and softness, which stimulates peristalsis and eases bowel movement.

Ophthalmic use: Wash hands before use. Tilt the head back, pull down the lower eyelid to form a pocket, and instill the drop(s) of CMC Luvis without touching the dropper tip to the eye or any surface. Close the eye gently for 1-2 minutes. If wearing contact lenses, remove them before instillation unless the product is specifically labeled safe for use with lenses in place.

Oral/dental paste: Dry the affected area with a cotton swab or gauze before applying a thin layer of CMC Luvis paste; avoid eating or drinking immediately after application.

Oral bulk-forming use: Take CMC Luvis-containing products with adequate fluid intake to reduce the risk of esophageal or intestinal obstruction.

CMC Luvis used ophthalmically or as an oral mucosal protectant has minimal systemic absorption and a low potential for clinically significant drug interactions.

• Other ophthalmic medications: If using other eye drops or ointments concurrently, space administration by at least 5-10 minutes and apply CMC Luvis last if it is meant to act as a lubricant/protectant, unless otherwise directed by a physician.
• Oral medications (bulk-forming use): CMC Luvis-containing bulk fiber products may reduce the absorption of certain oral medications (e.g., digoxin, some antibiotics) if taken at the same time; separate dosing by at least 1-2 hours.

CMC Luvis is generally well tolerated. Reported adverse effects include:

• Ophthalmic use: Temporary blurred vision immediately after instillation, mild stinging or burning, and eye irritation. Preservative-containing formulations of CMC Luvis may cause more irritation with frequent, long-term use compared with preservative-free single-use vials.
• Oral/dental paste use: Local irritation or an unpleasant taste; rare hypersensitivity reactions.
• Oral bulk-forming use: Bloating, flatulence, or abdominal discomfort, particularly if fluid intake is inadequate.

Discontinue CMC Luvis and seek medical evaluation if eye pain, vision changes, or persistent irritation occurs (see Precautions and Warnings).

CMC Luvis has minimal systemic absorption when used as an ophthalmic lubricant, oral mucosal protectant, or bulk-forming agent, and is generally considered acceptable for use during pregnancy and breastfeeding. However, as with any medicine, CMC Luvis should be used during pregnancy and lactation only if clearly needed, and a physician or pharmacist should be consulted before use to confirm appropriateness for the individual situation.

• For ophthalmic use, contact lenses should generally be removed before instilling CMC Luvis and may be reinserted after the interval stated on the product label, unless the product is specifically labeled safe for use with lenses in place.
• Temporary blurred vision immediately after instillation of CMC Luvis eye drops is common and expected; avoid driving or operating machinery until vision clears.
• Preservative-containing CMC Luvis formulations may cause more irritation with frequent or prolonged use than preservative-free, single-use vials.
• For oral/dental paste use, avoid swallowing large amounts of CMC Luvis paste, and discontinue use if irritation worsens.
• Discontinue CMC Luvis and seek prompt medical evaluation if eye pain, changes in vision, or persistent irritation/redness occurs, or if a mouth lesion does not improve within 7 days.
• For bulk-forming laxative use, adequate fluid intake is essential; inadequate fluid intake with CMC Luvis-containing fiber products may cause choking or intestinal obstruction.

Overdose with CMC Luvis is unlikely given its minimal systemic absorption. Accidental ingestion of ophthalmic CMC Luvis solution is unlikely to cause serious harm but may cause mild gastrointestinal upset. Excessive or prolonged ophthalmic use of CMC Luvis may worsen local irritation. If a large amount of CMC Luvis is ingested, or if any concerning symptoms develop after use, contact a physician, seek immediate medical attention, or contact a poison control center.

Store CMC Luvis at room temperature (below 30°C), away from light and moisture. Keep the container tightly closed, discard opened multi-dose eye drop bottles after the period stated on the label (commonly 4 weeks after opening), and discard single-use preservative-free vials after use. Keep CMC Luvis out of reach of children.

Pediatric use

CMC Luvis ophthalmic solution can generally be used in children for dry eye relief under caregiver supervision. The oral/dental paste is typically used in children 12 years and older, and safety and efficacy of the oral bulk-forming laxative use of CMC Luvis in young children has not been well established; consult a physician before use in children under 6 years.

Elderly use

No dose adjustment of CMC Luvis is typically required in elderly patients; dry eye is common in this population and CMC Luvis is commonly used for symptomatic relief.

Renal/hepatic impairment

No dose adjustment of CMC Luvis is required for ophthalmic or topical oral use in renal or hepatic impairment, given minimal systemic absorption.

CMC Luvis ophthalmic solution may be used as needed for as long as symptoms of dryness persist. If symptoms do not improve within 72 hours, worsen, or if eye pain or vision changes occur, discontinue CMC Luvis and consult a physician. For oral/dental paste use, CMC Luvis is typically applied until the lesion heals, generally within 7 days; if the lesion does not improve within this period, medical evaluation is advised.

Ophthalmic lubricant / artificial tear substitute; ocular surface protectant; oral mucosal protectant; bulk-forming agent (cellulose derivative).

Carmellose Sodium works by forming a viscous, mucoadhesive film over the ocular surface or mucosal lesion, which increases moisture retention, reduces frictional damage, and provides a protective barrier that promotes comfort and supports natural healing. When used as a bulk-forming agent, Carmellose Sodium absorbs water in the gastrointestinal tract, increasing stool bulk and facilitating bowel movement through mechanical stimulation of peristalsis.

CMC Luvis ophthalmic solution is generally considered suitable for use in children for temporary relief of dry eye symptoms, under adult supervision to ensure correct administration technique. The oral/dental protective paste form of CMC Luvis is generally used in children 12 years and older. Safety and efficacy of CMC Luvis as an oral bulk-forming laxative have not been well established in children under 6 years; consult a pediatrician before use in this age group.