pentobarbital will decrease the level or effect of oxybutynin ort affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.pentobarbital will decrease the level or effect of budesonide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Bildskärm.Ni kan få en kopparspiral insatt akut av barnmorska eller