Medically reviewed by Jessica Swirble, PharmD
Last updated on 5/2/2024

Drug Information | Side Effects | Use & Dosage | Request a Prescription

Guanfacine is available in the following forms:

• Oral tablets (1 mg, 2 mg, 3 mg)
  
• Extended release tablet (1 mg, 2 mg, 3 mg, 4 mg)
  
  

The typical starting dose of guanfacine can vary based on several factors, including the condition being treated, the severity of the condition, and individual patient characteristics. It's crucial to adhere to your healthcare provider's guidance regarding dosage and administration.

For attention deficit hyperactivity disorder (ADHD) in children and adolescents aged 6 to 17 years old, the typical starting doses may be:

• 1 mg taken orally once daily, usually at bedtime.
  
  

For adults with hypertension (high blood pressure), the typical starting dose may be:

• 1 mg taken orally once daily at bedtime, with or without food.
  
  

Your healthcare provider will assess your medical history, current medications, and response to treatment to determine the most suitable dose for you.

Guanfacine should be taken exactly as prescribed by your healthcare provider. Avoid exceeding the recommended dose or altering the treatment duration without consulting your provider.

If you have any questions about your dosage, contact your healthcare provider. If you want to talk to a provider right away, book an online doctor appointment on Sesame to discuss your concerns.

If you miss a dose, take it as soon as you remember it. If it's almost time for another dose of guanfacine, skip the missed dose and take your next dose as scheduled. Do not take or apply a double dose of guanfacine.

Do not discontinue or alter your guanfacine dosage without consulting with your healthcare provider. Guanfacine must be discontinued slowly. Withdrawal symptoms and rebound hypertension may occur if use is discontinued suddenly.

Follow your healthcare provider's instructions regarding dosing and other recommendations for taking guanfacine.

Store guanfacine as directed by your healthcare provider or pharmacist. Proper storage is essential to maintain the medication's effectiveness. Guanfacine should be stored at room temperature, away from excessive heat, light, and moisture.

Keep the medication out of the reach of children and ensure that the container is tightly closed.