Doxazosin and Increased Heart Rate: What Users Say

• Ano...
• Taken for less than 1 month
• September 5, 2025

For High Blood Pressure "I'm so happy I found this site. I now realize I'm not imagining my symptoms: racing heart, breathless, headaches, and my anxiety has gone through the roof. My BP has increased, and I feel absolutely terrible since taking doxazosin."

• Ann...
• Taken for less than 1 month
• March 12, 2022

For High Blood Pressure "I have been on this medication for 2 weeks now and hoping side effects subside. I'm 47 years old with a ventricular septal defect, and it has worked in lowering my BP, but I am struggling in Taekwondo training and have had to sit out due to dizziness and racing heartbeat, then swollen feet, then I sleep afterwards. This med was added to losartan and felodipine out of desperation to lower BP as other meds didn't suit, but this one is probably the worst for side effects so far."

• ome...
• Taken for 2 to 5 years
• July 14, 2016

For High Blood Pressure "I had radiotherapy for testicular cancer in 1977 - aged 30. A camera revealed scarring to my bladder neck in about 2005, and telangiectasia (spelling may be wrong). Doxazosin initially prescribed for persistent high blood pressure reasons at 2 mg but recently raised to 4 then 8 mg per day. Higher doses may cause a pounding heart for 1 to 3 hours after waking - not nice. Also, a dry mouth and nasal congestion. But urine flow is much better when taking the drug. I should also mention that I have various allergies."

• Don...
• Taken for less than 1 month
• March 5, 2022

"I would strongly caution against taking this medication for kidney stones. I was prescribed 4 mg daily for seven days for the treatment of kidney stones. I passed the stones, returned to work, and five days later, my blood pressure dropped so low I passed out three times, I thought I was having a heart attack. I had numbness and tingling in my right arm, shortness of breath, my heart was racing, I vomited, passed out, and nearly pooped myself. I am still experiencing soreness in my heart, and my tongue is dry. Don't take this unless you want a trip to the ER."