
phenobarbital oral brand names and other generic formulations include:
Barbita Oral, Neuroval Oral, Sk-Phenobarbital Oral, Solfoton Oral
norethindrone (contraceptive) oral brand names and other generic formulations include:
Camila Oral, Deblitane Oral, Errin Oral, Heather Oral, Jencycla Oral, Jolivette Oral, Lyza Oral, Micronor (28) Oral, Nora-BE Oral, Norlyroc Oral, Nor-QD Oral, Ortho Micronor Oral, Sharobel Oral
phenobarbital oral and norethindrone (contraceptive) oral
phenobarbital oral will decrease the level or effect of norethindrone (contraceptive) oral by altering drug metabolism. This combination reduces the effect of the hormonal contraceptive and may increase incidence of menstruation associated adverse effects.
phenobarbital oral and norethindrone (contraceptive) oral
phenobarbital oral will decrease the level or effect of norethindrone (contraceptive) oral by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid coadministration unless benefit outweighs risk. When coadministered, hormonal contraceptives are not a reliable method of effective birth control. Concomitant use may increase incidence of menstruation associated adverse effects (amenorrhea, dysmenorrhea, menorrhagia).
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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