The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
- Dizziness
- Sleepiness
- Stuffy nose
- Upset stomach
- Small pupils
- Trouble ejaculating
- Pounding heart (fast heart rate)
Phenoxybenzamine serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Dangerously low blood pressure: dizziness, lightheadedness, pale skin, feeling faint
Source: DailyMed
The following Phenoxybenzamine side effects have also been reported
In rats and mice, phenoxybenzamine has been found to increase the risk of development of malignant tumors. It is not known if phenoxybenzamine increases the chance of tumors in humans.
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
More common
Dizziness or lightheadedness, especially when getting up from a lying or sitting position
fast heartbeat
pinpoint pupils
Less common
Confusion
drowsiness
dryness of mouth
headache
lack of energy
sexual problems in males
unusual tiredness or weakness
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
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