Der bør udvises forsigtighed ved ordination og infusion af IVIg til adipøse patienter, patienter med allerede eksisterende risikofaktorer for tromboemboliske episoder (fx høj alder, hypertension, diabetes mellitus eller tidligere vaskulære sygdomme eller tromboemboliske episoder, patienter med erhvervet eller medfødt trombofili, patienter med længerevarende immobilisering, patienter med svær hypovolæmi samt patienter med sygdomme, der øger blodviskositeten).
Caution should be exercised in prescribing and infusing IVIg in obese patients and in patients with pre-existing risk factors for thrombotic events (such as advanced age, hypertension, diabetes mellitus and a history of vascular disease or thrombotic episodes, patients with acquired or inherited thrombophilic disorders, patients with prolonged periods of immobilisation, severely hypovolemic patients, and patients with diseases which increase blood viscosity).