How much air should be added to the syringe containing dispersed capsule contents of the Ethypharm UK Ltd product, esomeprazole 40 mg gastro-resistant hard capsules, for gastric-tube administration?

For gastric-tube administration of the Ethypharm UK Ltd product, esomeprazole 40 mg gastro-resistant hard capsules, add approximately 5 ml of air to the syringe containing the suspension.