CBD inhibits CYP450 enzymes (notably CYP3A4 and CYP2C19) that metabolize many drugs: blood thinners, anti-epileptics, some antidepressants. If a medication carries a grapefruit warning, treat CBD the same way and ask a pharmacist.
What "strong evidence" means here: Convergent evidence: controlled trials, systematic reviews, or long-established pharmacology.