Here's what rhymes with sildenafil.

Consider these alternatives

bupropion / utopian fluoxetine / seen clomiphene / seen finasteride / side sertraline / seen methylphenidate / state imatinib / which rosiglitazone / shown ranitidine / between olanzapine / line phenylephrine / line venlafaxine / seen aprotinin / meaning quetiapine / seen salicylate / late amitriptyline / skyline isotretinoin / join gabapentin / depending levothyroxine / thyroxine