phenobarbital oral brand names and other generic formulations include:
Barbita Oral, Neuroval Oral, Sk-Phenobarbital Oral, Solfoton Oral
norgestimate-ethinyl estradiol oral brand names and other generic formulations include:
Estarylla Oral, Mono-Linyah Oral, Mononessa (28) Oral, Ortho Tri-Cyclen (21) Oral, Ortho Tri-Cyclen (28) Oral, Ortho Tri-Cyclen Lo (28) Oral, Ortho-Cyclen (21) Oral, Ortho-Cyclen (28) Oral, Previfem Oral, Sprintec (28) Oral, Tri-Estarylla Oral, Tri-Linyah Oral, Tri-Lo-Sprintec Oral, TriNessa (28) Oral, Tri-Previfem (28) Oral, Tri-Sprintec (28) Oral
phenobarbital oral and norgestimate-ethinyl estradiol oral
phenobarbital oral will decrease the level or effect of norgestimate-ethinyl estradiol oral by altering drug metabolism. The effect of hormonal contraceptives may be reduced. Use of a nonhormonal contraceptive is recommended.
phenobarbital oral and norgestimate-ethinyl estradiol oral
phenobarbital oral will decrease the level or effect of norgestimate-ethinyl estradiol oral by affecting hepatic/intestinal enzyme CYP3A4 metabolism. The efficacy of hormonal contraceptives may be reduced. Use of a nonhormonal contraceptive is recommended.
Check for more interactions with the Drug Interaction Checker
Drug Interaction Categories
Contraindicated
Never use this combination of drugs because of high risk for dangerous interaction
Serious
Potential for serious interaction; regular monitoring by your doctor required or alternate medication may be needed
Significant
Potential for significant interaction (monitoring by your doctor is likely required)
Minor
Interaction is unlikely, minor, or nonsignificant