( 7.3 ) Midazolam : Decreased exposure; monitor for suboptimal effect of midazolam. Midazolam Concomitant use of glycerol phenylbutyrate decreased the systemic exposure of midazolam. Monitor for suboptimal effect of midazolam in patients who are being treated with glycerol phenylbutyrate.
Source: FDA drug label - glycerol phenylbutyrate