Always read the ingredients before taking this or any other medication to ensure that there are no elements that may elicit an allergic reaction. Seek immediate medical attention if you experience any of the following side-effects associated with an allergic reaction: hives, shortness of breath, swelling of the lips, tongue, throat or face.
Seek immediate medical attention if you experience any of the following serious side effects:
fainting spells, or feeling as if you will pass out, accelerated heart rate, chest pains, swollen hands, feet or ankles, problems breathing, painful penis erections, or erection that last for longer than 4 hours. Contact your doctor if illness persists, especially if you experience prolonged diarrhea or vomiting.
Less serious side effects associated with Doxazosin include:
fatigue, dizzy feeling, nausea, headache, or runny nose.
Additional side-effects may result from taking this medication. Consult a medical profession before taking this or any other medication.