Medically reviewed by Jessica Swirble, PharmD
Last updated on 7/10/2024
Drug Information | Side Effects | Use & Dosage | Request a Prescription
The use of extended-release guanfacine can lead to various side effects in some individuals.
Common mild side effects of extended-release guanfacine use include:
More severe side effects include:
If you experience any severe or concerning side effects while taking extended-release guanfacine, contact your healthcare provider right away.
Inform your healthcare provider about any existing medical conditions, allergies, or other medications you are taking before starting treatment with extended-release guanfacine. This includes prescription drugs, over-the-counter medications, and dietary supplements, as they may interact with guanfacine.
Tell your provider if you are taking these medications or supplements:
You should also mention medical conditions such as:
If you are pregnant, planning to become pregnant, or breastfeeding, discuss the potential risks and benefits of using guanfacine with your healthcare provider.
Take extended-release guanfacine exactly as prescribed by your healthcare provider. Do not exceed the recommended dose or duration of treatment.
Extended-release guanfacine can cause drowsiness or dizziness. Do not drive or operate machinery until you know how this medication affects you.
Complete the full course of treatment, even if you feel better, to ensure the medication's effectiveness in managing your condition.
In case of an extended-release guanfacine overdose, seek medical attention immediately. Symptoms of overdose may include severe drowsiness, dizziness, slow heart rate, and low blood pressure. If you suspect an overdose, contact the poison control helpline at 1-800-222-1222 or call emergency services.