The blood pressure lowering effect of<unk>  can be amplified significantly by PDE5 inhibitors, potentially leading to fainting or myocardial infarction, and to a lesser extent by other antihypertensive drugs such as beta blockers, calcium channel blockers, or other nitrovasodilators. Ergolines can antagonise the effects of<unk> .
Molsidomine
Tolperisone
Tilorone
Scopolamine
Clofoctol
Tesofensine
Carctol
Tiratricol