Promethazine. Quinine. Quetiapine (Seroquel). Risperidone (Risperdal). Ritonavir If there is a 50 ms increase in QTc OR the QTc 500 ms, o REDUCE
by N Niimi 2024 Cited by 19Abbreviations: LQTS, Long QT Syndrome; QTc, corrected QT interval. Promethazine significantly lengthens QTc, but has no effect on TDR.
Promethazine. Promethazine may increase the QTc-prolonging activities of Azithromycin. Propafenone. Azithromycin may increase the QTc-prolonging activities
by B Gray 2024 Cited by 10(6) promethazine and trimipramine both increase QTc interval. Page 58. Pharmacodynamic synergy. (7) promethazine and fluoxetine both increase QTc interval.
Promethazine, The risk or severity of QTc prolongation can be increased when Salbutamol is combined with Promethazine. Propafenone, The therapeutic efficacy
Use Caution/Monitor. promethazine. promethazine and azithromycin both increase QTc interval. Use Caution/Monitor. propafenone. azithromycin increases
Use Caution/Monitor. trazodone. promethazine and trazodone both increase QTc interval. Use Caution/Monitor. promethazine and trazodone both increase sedation.
QTc Off license information: Haloperidol is contra-indicated in QT Promethazine has a conditional risk of QTc prolongation. The BAP guidelines
Additive anticholinergic adverse effects may occur. tetrabenazine. tetrabenazine and promethazine both decrease QTc interval. Avoid or Use Alternate Drug. thioridazine. promethazine and thioridazine both increase QTc interval. Avoid or Use Alternate Drug. tranylcypromine. tranylcypromine increases effects of promethazine by Other (see comment).
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