Soluvit – N Infusion

Soluvit N is a lyophilized, sterile, yellow powder containing water-soluble vitamins specifically formulated for intravenous nutrition. This preparation plays a crucial role in parenteral nutrition regimens by providing essential water-soluble vitamins to patients who cannot meet their nutritional requirements through conventional oral intake. The following comprehensive guide explores the composition, therapeutic indications, administration, and clinical considerations of Soluvit N to assist healthcare professionals in optimizing patient care during parenteral nutrition therapy.

Composition and Formulation

Soluvit N contains a balanced blend of water-soluble vitamins essential for various metabolic processes. Each vial contains nine active ingredients that cover the daily requirements of B-complex vitamins and vitamin C. The precise quantitative composition ensures that patients receive adequate vitamin supplementation during intravenous nutrition therapy.

Active Ingredients

Soluvit N contains the following water-soluble vitamins per vial:

1. Thiamine nitrate (Vitamin B1) – 3.1 mg

2. Riboflavine sodium phosphate (Vitamin B2) – 4.9 mg (corresponding to 3.6 mg Vitamin B2)

3. Nicotinamide (Vitamin B3) – 40 mg

4. Pyridoxine hydrochloride (Vitamin B6) – 4.9 mg (corresponding to 4.0 mg Vitamin B6)

5. Sodium pantothenate (Vitamin B5) – 16.5 mg (corresponding to 15.0 mg pantothenic acid)

6. Sodium ascorbate (Vitamin C) – 113 mg (corresponding to 100 mg Vitamin C)

7. Biotin (Vitamin B7) – 60 μg

8. Folic acid (Vitamin B9) – 400 μg

9. Cyanocobalamin (Vitamin B12) – 5.0 μg

The formulation also contains excipients including glycine (aminoacetic acid), disodium edetate, and methyl parahydroxybenzoate as stabilizers.

Physical Properties

When reconstituted in 10 ml of appropriate diluent, the solution has the following characteristics:

• Osmolality: approximately 490 mOsm/kg water

• pH: 5.8

Therapeutic Indications

Soluvit N is indicated as a supplement in intravenous nutrition to meet the daily requirements of water-soluble vitamins in various patient populations. It is intended for use when oral or enteral intake of nutrients is impossible, insufficient, or contraindicated.

The primary therapeutic indications include:

• Supplement to parenteral nutrition regimens in adults and children

• Prevention of water-soluble vitamin deficiencies during intravenous nutrition

• Part of a complete parenteral nutrition protocol along with fats, amino acids, carbohydrates, and trace elements

For patients receiving prolonged parenteral nutrition, fat-soluble vitamins should also be administered alongside Soluvit N to ensure comprehensive vitamin supplementation.

Dosage and Administration

Adult Dosage

For adult patients and children weighing 10 kg or more, the recommended daily dosage is the content of one vial (10 ml when reconstituted).

Pediatric Dosage

Children, infants, and neonates weighing less than 10 kg should be given 1/10 of the content of one vial (1 ml of reconstituted solution) per kg body weight per day.

Method of Administration

Soluvit N must never be given undiluted. The lyophilized powder must be reconstituted before administration by aseptically adding 10 ml of one of the following solutions:

1. Vitalipid N Adult/Infant (Vitalipid N Adult is only indicated for use in patients aged 11 years and above)

2. Intralipid 10%, 20%, or 30% lipid emulsion for infusion (Intralipid 30% is not recommended in children)

3. Water for Injections

4. Sodium chloride 0.9% injection

5. Glucose solution for infusion

6. SMOFlipid

After reconstitution, Soluvit N should be added to the parenteral nutrition admixture under aseptic conditions, immediately before the start of the infusion. The daily dosage should be administered over a number of hours for safety reasons and to prevent excessive excretion of water-soluble vitamins.

Contraindications

Soluvit N is contraindicated in patients with:

• Known hypersensitivity to any of the components, for example, thiamine or methyl hydroxybenzoate

• Hypersensitivity to the active substances or to any of the excipients

Warnings and Precautions

• Soluvit N must not be given undiluted

• When Soluvit N is diluted with water-based solutions, the admixture should be protected from light. This is not necessary if Soluvit N is diluted with Intralipid because of the protective effect of the fat emulsion

• The Soluvit N doses recommended are insufficient to correct severe vitamin deficiency states and may be insufficient in patients with markedly increased vitamin requirements

• In patients receiving total parenteral nutrition (TPN), routine supplementation with both fat-soluble and water-soluble vitamins is recommended to prevent deficiency states

Laboratory Test Interference

Biotin may interfere with laboratory tests that are based on a biotin/streptavidin interaction, leading to either falsely decreased or falsely increased test results, depending on the assay. The risk of interference is higher in children and patients with renal impairment and increases with higher doses. When interpreting results of laboratory tests, possible biotin interference should be taken into consideration, especially if there is a lack of coherence with the clinical presentation. Alternative tests not susceptible to biotin interference should be used, if available, in cases where interference is suspected. The laboratory personnel should be consulted when ordering laboratory tests in patients taking biotin.

Pregnancy and Lactation

Soluvit N is a supplement in TPN regimens, providing water-soluble vitamins. No hazard is expected if used in pregnancy at the recommended dosage, covering the daily requirements of vitamins B1, B2, B6, B12, and C.

Side Effects

Adverse reactions that may be expected based on experience with other water-soluble vitamin compounds administered intravenously include:

• Allergic reactions, including anaphylaxis

• Dermatological reactions including flushing, erythema, pruritus

• CNS reactions including headache, dizziness, and agitation

Flushing, itching, or burning of the skin may occur in patients susceptible to the effects of nicotinamide.

Drug Interactions

Several important drug interactions should be considered when administering Soluvit N:

• Pyridoxine (Vitamin B6) can reduce the effect of levodopa

• Some optic neuropathies appear to respond to massive doses of hydroxocobalamin and have been claimed to be adversely affected by administration of cyanocobalamin

• Folic acid may lower the serum concentration of phenytoin and obscure pernicious anemia

• Administering folic acid may obscure pernicious anemia

Clinical Pharmacology

Pharmacodynamics

Soluvit N is formulated to supply water-soluble vitamins as part of a total parenteral nutrition regimen. These vitamins contribute to the patient’s antioxidative capacity, support the immune system, and enable the optimal utilization of macronutrients.

Pharmacokinetics

Soluvit N is a product without specific interest for pharmacokinetic studies as it contains water-soluble vitamins that are normally present in the body.

Storage and Handling

Soluvit N may be added to parenteral nutrition admixtures containing carbohydrates, lipids, amino acids, electrolytes, and trace elements, provided that compatibility and stability have been confirmed. Clear admixtures containing Soluvit N should be protected from light. The reconstituted solution must be used within 24 hours.

Any unused medicinal product or waste material should be disposed of in accordance with local requirements.

Soluvit N Benefits

Soluvit N offers several benefits in the context of parenteral nutrition:

• Helps normalize the patient’s metabolic capacity and enables the optimal utilization of macronutrients

• Contributes to the patient’s antioxidative capacity

• Supports the patient’s immune system

• Allows for specific PN vitamin substitution, from preterm infants to geriatric patients

• Extensive compatibility and stability data are available with a wide range of admixtures

• Well proven worldwide in many millions of patients

In particular, when used with lipid emulsions and dark delivery tubing, Soluvit N has been shown to protect against light-induced formation of lipid hydroperoxides while limiting vitamin loss. This approach should be considered for routine use as well as during phototherapy.

Summary Table

Conclusion

Soluvit N represents a comprehensive solution for water-soluble vitamin supplementation in patients requiring parenteral nutrition. By providing essential vitamins in an appropriate formulation for intravenous administration, it helps prevent vitamin deficiencies and supports optimal metabolic function. Healthcare professionals should carefully consider the patient’s clinical status, weight, and specific nutritional requirements when determining the appropriate dosage and administration method.

With proper use according to established guidelines, Soluvit N plays a valuable role in maintaining nutritional status during periods when conventional nutrient intake is insufficient or impossible.