Ciprofloxacin and Lofexidine interaction
Ciprofloxacin and Lofexidine: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Ciprofloxacin label · effective 2026-06-30
Table 8: Drugs That are Affected by and Affecting Ciprofloxacin Drugs That are Affected by Ciprofloxacin Drug(s) Recommendation Comments Tizanidine Contraindicated Concomitant administration of tizanidine and ciprofloxacin is contraindicated due to the potentiation of hypotensive and sedative effects of tizanidine [see Contraindications ( 4.2 )].
From the Lofexidine label · effective 2026-07-22
Risk of QT Prolongation : Lofexidine tablets prolong the QT interval.
Risk of QT Prolongation Lofexidine tablets prolong the QT interval.
Methadone : Methadone and Lofexidine tablets both prolong the QT interval.
Methadone Lofexidine tablets and methadone both prolong the QT interval.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.