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In the two 12-week, placebo-controlled clinical trials, the following adverse events were reported by between 1% and 2% of patients receiving Silodosin and occurred more frequently than with placebo: insomnia, increased PSA, sinusitis, abdominal pain, asthenia, and rhinorrhea. One case of syncope in a patient taking prazosin concomitantly and one case of priapism were reported in the Silodosin treatment group.
In a 9-month open-label safety study of Silodosin, one case of Intraoperative Floppy Iris Syndrome (IFIS) was reported.
Post Marketing Experience: The following adverse reactions have been identified during post approval use of Silodosin. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
Skin and subcutaneous tissue disorders: toxic skin eruption, purpura, skin rash, pruritus, and urticaria.
Hepatobiliary disorders: jaundice, impaired hepatic function associated with increased transaminase values.
Immune system disorders: allergic-type reactions, not limited to skin reactions including swollen tongue and pharyngeal edema resulting in serious outcomes.
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