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1. Isoplex 4% W/V Solution For Infusion
2. Isoplex 4% W/V Solution For Infusion

Isoplex is a colloidal plasma substitute indicated for the initial management of hypovolaemic shock caused by, for example, haemorrhage, acute trauma or surgery, burns, sepsis, peritonitis, pancreatitis or crush injury.

Isoplex may be used in the initial treatment of blood loss during pregnancy where plasma volume replacement is needed.

4.2 Posology and method of administration

Isoplex is administered intravenously; the volume and rate of infusion will depend on the condition of the patient. The rate of administration can be increased by the application of pressure to the container or by adjusting the giving set pump. When given rapidly Isoplex should be warmed to no more than 37^oC if possible. In severe acute blood loss, Isoplex may be given rapidly (500ml in 5 - 10 minutes) until signs of hypovolaemia are relieved. When large volumes are given, suitable monitoring should be used to ensure that an adequate haematocrit is maintained (the haematocrit should not be allowed to fall below 25%) and that dilutional effects upon coagulation are avoided. (Expert haematological advice should be sought, especially in cases of massive blood loss).

For massive fluid loss, Isoplex may be used concomitantly with blood, the rate and amount of which depends on the clinical condition of the patient. The haemodynamic status of the patient should be monitored.

If blood is to be given at the same time as Isoplex, it can be given through the same giving set since Isoplex has a negligible calcium content and therefore does not clot blood. Isoplex can also be used to reconstitute packed red cells.

4.3    Contraindications

Isoplex is contra-indicated in patients with a known hypersensitivity to succinylated gelatin.

Lactate containing solutions are contraindicated in patients with liver disease.

4.4    Special warnings and precautions for use

(i) Severe anaphylactic or anaphylactoid reactions have been reported following the intravenous administration of succinylated gelatin. These are rare, having an incidence of between 1 in 6,000 and 1 in 13,000 units. However, they may be more likely to occur if Isoplex is given rapidly to normovolaemic patients, and may be assumed to be more hazardous in patients with known allergic conditions such as asthma.

Treatment: The infusion of Isoplex should be stopped. Further treatment will depend on the severity of the reaction; administration of supplemental oxygen; an alternative infusion fluid; and the parenteral administration of adrenaline (e.g. for adults, 0.5 ml of a 1 in1 000 solution intramuscularly, repeated every 5 minutes as necessary, or 5ml of a 1 in 10 000 solution slowly intravenously), and an antihistamine (eg chlorpheniramine 10-20mg slowly intravenously) should be considered.

(ii) Caution should be exercised in infusing Isoplex in any patient liable to develop circulatory overload (for example, congestive cardiac failure or renal failure with oliguria or anuria).

Treatment: The infusion of Isoplex should be stopped and the patient treated symptomatically. Electrolytes should be monitored. If necessary, a diuretic can be given to promote fluid loss. Decreased urinary output secondary to shock is not a contraindication unless there is no improvement in urine output after the initial dose of Isoplex.

4.5 Interaction with other medicinal products and other forms of interaction

No interaction studies have been performed

4.6 Pregnancy and lactation

There is very little information available on the use of plasma substitutes in pregnant or lactating women. As with all drugs, the benefits and risks must be assessed.

Isoplex may be used in the initial treatment of blood loss during pregnancy where plasma volume replacement is needed.

4.7 Effects on ability to drive and use machines

Not applicable.

4.8 Undesirable effects

The major undesirable effect risk associated with succinylated gelatin is that of a severe anaphylactic or anaphylactoid reaction, the occurrence and treatment of which is discussed in “4.4 Special warnings and precautions for use”.

A list of rare undesirable effects that have been associated with the administration of succinylated gelatin is given beneath ;

Rare effects ( > 1 in 10,000 to < 1 in 1,000)

Immune system disorders Anaphylactic reaction Anaphylactoid reaction

Nervous system disorders Tremor

Cardiac disorders Tachycardia

Vascular disorders

Hypotension

Hypertension

Respiratory, thoracic and mediastinal disorders

Wheezing

Dyspnoea

Hypoxia

Skin and subcutaneous tissue disorders

Urticarial reactions

Sweating

General disorders and administration site conditions

Chills

Pyrexia

4.9 Overdose

An overdose of Isoplex may give rise to circulatory overload and electrolyte imbalance (see Section 4.4 Special warnings and precautions for use).

5.1    Pharmacodynamic properties

Pharmacotherapeutic group : Gelatin agents ; ATC code B05A A 06

Isoplex is a colloidal plasma substitute. When used in the treatment of hypovolaemia, Isoplex produces significant increases in blood volume, cardiac output, stroke volume, blood pressure, urinary output and oxygen delivery.

Isoplex promotes osmotic diuresis, thereby helping to protect the kidneys from the adverse effects of hypovolaemia.

5.2    Pharmacokinetic properties

The half-life of Isoplex is about 4 hours, with the majority of the dose administered being eliminated by renal excretion within 24 hours.

5.3    Preclinical safety data

There are no preclinical data of relevance to the prescriber, which are additional to those already included in other sections of the SmPC.

6    PHARMACEUTICAL PARTICULARS

6.1    List of excipients

Sodium chloride

Sodium lactate

Potassium chloride

Magnesium chloride

Sodium hydroxide/hydrochloric acid

Water for injection

Isoplex contains no preservatives

6.2 Incompatibilities

In the absence of compatibility studies, this medicinal product must not be mixed with other medicinal products.

Isoplex does not interfere with blood grouping or cross-matching.

6.3 Shelf life

The shelf life for Isoplex 500ml and 1000ml is 2 years.

6.4 Special precautions for storage

Do not store above 25°C. Do not freeze or refrigerate.

6.5 Nature and contents of container

Isoplex is supplied in sterile flexible infusion bags (500 or 1000 ml), which are overwrapped.

For 500 ml bags, each pack contains 10 units. For 1000 ml bags, each pack contains 6 units

6.6 Special precautions for disposal

Do not use unless container is free of particles. Do not use if moisture is present between the container and the overwrap, or if the overwrap is damaged. Do not use if the container is not intact before breaking the seal. Check for leaks by squeezing the container before use. For single dose use only. Discard any unused solution immediately after initial use. Do not reconnect any partially used containers

7    MARKETING AUTHORISATION HOLDER

Beacon Pharmaceuticals Ltd 85, High Street Tunbridge Wells Kent TN1 IYG UK

8    MARKETING AUTHORISATION NUMBER(S)

PL 18157/0244

9    DATE OF FIRST AUTHORISATION/RENEWAL OF THE

AUTHORISATION 07/07/2008

10 DATE OF REVISION OF THE TEXT

06/08/2008