G-Prazosin Prazosin Hydrochloride Phenylbutazone
ModerateAlphapress XR (prazosin hydrochloride) has not caused any known problems when taken with phenylbutazone. In clinical use so far, no adverse drug interaction has been reported between the two.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.