Table 1. General characteristic of cases (in chronologic order).

Author	Patient gender & age	Anti-diabetics	[Period before onset of BP]	Diagnosis	Treatment	Outcome
Attaway et al. (2013)	M / 70	Sitagliptin + metformin	12 mo	DIF: Linear IgG and linear C3 BMZ pattern	Changed anti-hyperglycemic treatment on admission MP 60 mg q8hr IV x 3 days, then prednisone 0.75 mg/kg bw/day with tapering after stable remission	Sustained remission after the sitagliptin was discontinued at 2 mo follow up
Aouidad et al. (2013)	M / 61	Vildagliptin + metformin	6 mo	DIF: Linear IgG and linear C3 BMZ pattern Indirect IF positive	Topical corticosteroid (clobetasol propionate) on a 15-wk tapering regimen	Disappearance of the pruritus 1 wk after medication treatment halted Sustained remission at 2 mo follow up
	M / 93	Sitagliptin + gliclazide	6 mo	Indirect IF negative *	Topical corticosteroid (clobetasol propionate) 2 months after first lesions appeared	Refractory disease under topical treatment and sitagliptin therapy for 10 months Partial remission 2 wk after stopping sitagliptin treatment
	M / 76	Sitagliptin + metformin	5 mo	Indirect IF negative*	Topical corticosteroid (clobetasol propionate)	Delayed improvement of the eruption with topical treatment after 6 mo with persisting pruritus
Skandalis et al. (2012)	F / 78	Vildagliptin + metformin	13 mo	DIF: Linear IgG and linear C3 BMZ pattern Indirect IF positive	MP: 0.5 mg∕kg bw∕day, followed by MTX: 0.1 mg ∕ kg bw ∕ week with MP tapering after induction of stable remission Delayed change of anti- hyperglycaemic treatment (after discharge)	Sustained remission at 384 mg prednisone equivalent cumulative dose Refractory disease with slow tapering of MP
	F / 80	Sitagliptin + metformin	4 mo	DIF: Linear BMZ C3 pattern Indirect IF positive	MP: 0.5 mg/kg bw/day, followed by MTX: 0.1 mg/kg bw∕week MP tapering after induction of stable remission Delayed change of anti- hyperglycaemic treatment (before discharge)	Sustained remission induced at 115 mg prednisone equivalent cumulative dose Rash reduction of MP at 4 mg/day within 6 weeks
	F / 72	Vildagliptin + metformin	8 mo	DIF: negative Indirect IF positive	Change of anti-hyperglycaemic treatment on admission Topical mometasone furoate 0.1% cream treatment only	Relapsed course under systemic corticosteroid pulses during a 4 mo period before admission Sustained remission within the first wk (6 days) after withdrawal of gliptin with topical treatment only
	M / 67	Vildagliptin + metformin	10 mo	DIF: Linear IgG and linear BMZ C3 pattern Indirect IF negative	Change of anti-hyperglycemic treatment on admission MP: 0.5 mg/kg bw/day MP tapering after induction of stable remission	Relapsed course under interrupted glucocorticoid treatment courses during a 6 mo period prior to admit Sustained remission 5 days after withdrawal of gliptin under treatment with MP (at cumulative dose 192 mg prednisone equivalent) MP tapering to 4 mg/day without relapse
	M / 75	Vildagliptin + metformin	2 mo	DIF: Linear IgG and linear BMZ C3 pattern Indirect IF positive	Changed anti-hyperglycemic treatment on admission MP: 0.5 mg/kg bw/day MTX: 0.1 mg/kg bw/week MP tapering after induction of stable remission	Gliptin treatment withdrawal 1 week before onset of anti-BP treatment with partial remission without anti-BP treatment at admission Sustained BP remission under quickly tapered MP schedule (complete remission at 115 mg cumulative prednisone equivalent dose)
Pasmatzi et al. (2011) #	F / 59	Vildagliptin + metformin	2 mo	DIF positive	0.5 mg/kg/day methylprednisolone on an 8-week tapering scheme	Complete remission was achieved 10 weeks after the vildagliptin / metformin was discontinued
	M / 67	Vildagliptin + metformin	2 mo	DIF positive	200 mg/day doxycycline for a period of 4 weeks	Complete remission was achieved 8 weeks after the vildagliptin / metformin was discontinued
* It was implied but not explicitly stated that a skin biopsy was performed with linear IgG and BMZ C3 pattern. # It was stated that histologic and immunofluorescence patterns from skin biopsy were consistent with BP but the exact studies done were not commented on.