Reaction

Suspected Counterfeit Product reporting signals

Last recalculated 2026-09-14T18:28:35.993900+00:00 · 3,892 reports · 35 co-occurring drugs

As of the last recalculation, Suspected Counterfeit Product appears in 3,892 FAERS reports alongside 35 co-occurring drug terms. The strongest observed disproportionality signal is ORLISTAT (PRR 23.6).

Important: FAERS is a spontaneous, voluntary, unverified reporting system. PRR and ROR identify reporting patterns for investigation; they are not incidence rates and do not establish causation.

Drug	Co-reports	PRR	ROR
Orlistat	111	23.6	23.7
Sildenafil Citrate	379	17.5	17.6
Ketoconazole	32	10.0	10.0
Tadalafil	164	9.1	9.1
Entecavir	18	8.3	8.3
Botulinum Toxin Type A	17	7.4	7.4
Testosterone Cypionate	12	7.2	7.2
Bictegravir Sodium, Emtricitabine, And Tenofovir Alafenamide Fumarate	20	5.9	5.9
Sildenafil	60	5.6	5.6
Liothyronine Sodium	9	5.5	5.5
Ado-Trastuzumab Emtansine	8	5.1	5.1
Oral Semaglutide	66	4.9	4.9
Sildenafil Powder,	32	4.8	4.8
Conjugated Estrogens	50	4.6	4.6
Estrogens, Conjugated	50	4.5	4.6
Emtricitabine And Tenofovir Alafenamide	9	4.3	4.3
Sitagliptin And Metformin Hydrochloride	17	4.2	4.2
Goserelin	9	3.6	3.6
Lisdexamfetamine Dimesylate	22	3.6	3.6
Thyroid, Porcine	7	3.5	3.5
Onabotulinumtoxina	48	3.4	3.4
Brinzolamide	5	3.1	3.1
Ibuprofen Tablets, Coated	24	3.0	3.0
Ibuprofen Sodium	24	3.0	3.0
Bevacizumab	68	3.0	3.0
Acetaminophen, Aspirin (Nsaid) And Caffeine	9	2.8	2.8
Guanfacine	4	2.7	2.7
Acetaminophen, Aspirin, And Caffeine	10	2.5	2.5
Osimertinib	12	2.0	2.0
Canagliflozin	10	1.8	1.8
Nirmatrelvir And Ritonavir	18	1.8	1.8
Elvitegravir, Cobicistat, Emtricitabine, And Tenofovir Alafenamide	3	1.6	1.6
Tirzepatide	42	1.4	1.4
Minoxidil	10	1.2	1.2
Somatropin	16	1.2	1.2

Related reactions

Data source: openFDA FAERS. See the OpenPV methodology and limitations.