Table 1.

Allergometric tests used for patients with suspect Polyethylen glycol (PEG) and/or Polysorbate 80 (PS80) hypersensitivity, modified from Banerji et al²² We used a cleansing preparation for colon endoscopy product as source of PEG 3350,100 mg/ml.¹⁷ Methyl-prednisolone Acetate (Depo-Medrol) 40 mg/ml and Triamcinolone acetonide (Kenacort) 40 mg/ml were used to intradermally test PEG 3350 and PS80 respectively

Step		Tested drug	Dilution	Cumulative time (min)
1	Positive control	Histamine	1:1	0
	Negative control	Glycerin	1:1
	Prick test	PEG 3350	1:100
	Prick test	Polysorbate 80	1:100
2	Prick test	PEG 3350	1:10	30
	Prick test	Polysorbate 80	1:10
3	Prick test	PEG 3350	1:1	60
4	Intradermal	Methyl-prednisolone Acetate (Depo-Medrol) 40 mg/ml	1:100	90
	Intradermal	Triamcinolone acetonide (Kenacort) 40 mg/ml	1:100
5	Intradermal	Methyl-prednisolone Acetate (Depo-Medrol) 40 mg/ml	1:10	120
	Intradermal	Triamcinolone acetonide (Kenacort) 40 mg/ml	1:10
6	Observation			180