2,670 reports of this reaction
7.2% of all PHENYTOIN reports
#1 most reported adverse reaction
DRUG INEFFECTIVE is the #1 most commonly reported adverse reaction for PHENYTOIN, manufactured by Viatris Specialty LLC. There are 2,670 FDA adverse event reports linking PHENYTOIN to DRUG INEFFECTIVE. This represents approximately 7.2% of all 36,996 adverse event reports for this drug.
Patients taking PHENYTOIN who experience drug ineffective should discuss this symptom with their healthcare provider to determine whether it may be related to their medication and what alternatives may be available.
DRUG INEFFECTIVE is moderately reported among PHENYTOIN users, representing a notable but not dominant share of adverse events.
In addition to drug ineffective, the following adverse reactions have been reported for PHENYTOIN:
The following drugs have also been linked to drug ineffective in FDA adverse event reports:
DRUG INEFFECTIVE has been reported as an adverse event in 2,670 FDA reports for PHENYTOIN. This does not prove causation, but indicates an association observed in post-market surveillance data.
DRUG INEFFECTIVE accounts for approximately 7.2% of all adverse event reports for PHENYTOIN, making it one of the most commonly reported side effect.
If you experience drug ineffective while taking PHENYTOIN, contact your healthcare provider. They can evaluate whether the symptom is related to your medication and discuss potential adjustments to your treatment plan. Do not stop taking prescribed medication without consulting your doctor.