Methadone Treatment Centers Near Ontario, CA

Why Trust Us

As a top-rated website for addiction treatment, AddictionGroup understands the importance of helping you find a reputable addiction clinic. Addiction is a severe problem, so our team comprehensively analyzed hundreds of methadone clinics to provide the best recommendations.

Here are some criteria that our team considers when researching and evaluating addiction clinics:

  • Licenses and accreditation
  • Specializations
  • Treatment approach
  • Experience in treating opioid addiction
  • Insurance coverage

We also employed advanced AI technology to evaluate 2842 patient reviews to identify the best methadone clinic in Ontario. It helps us narrow our recommendations so you can find the best clinic for your needs.

Top 8 Methadone Treatment Centers Near Ontario, CA

Aegis Treatment Centers | Ontario

125 W F St SUITE 101, Ontario, CA 91762

4.4 out of 5 (40 reviews)

The Ontario Aegis methadone clinic has received overwhelmingly positive reviews. Patients appreciate the kind and efficient staff, clean facility, affordable payment options, and long clinic hours. Additionally, the clinic offers counseling and support resources, caters to the needs of parents with small children, and has helped many individuals achieve sobriety. However, there are a few complaints about staff patience and difficulties in getting take-home medications. Overall, the clinic is highly recommended by its patients for effective opioid addiction treatment.


  • The clinic has a fast and efficient system, allowing patients to get in and out quickly for their methadone dosing.
  • The staff is described as amazing, kind, and respectful, creating a supportive and caring environment for patients.

Temecula Valley Comprehensive Treatment Center

40700 California Oaks Rd Suite 202, Murrieta, CA 92562

3.9 out of 5 (25 reviews)

The Methadone treatment center has a caring and non-judgmental staff who are committed to helping patients. They are described as angels who save lives and are considered family by some. The treatment provided is effective for those genuinely seeking to improve their lives, though some feel that others may misuse the facility as a temporary solution. The waiting room can get crowded at times, but overall, the center is praised for its friendly and professional staff.


  • The counselors and nurses genuinely care about their patients and provide a non-judgmental and caring environment.
  • The staff is described as angels and the most precious and wonderful people, indicating a high level of care and dedication.
  • The treatment and counseling provided at the center are effective in helping individuals straighten up their lives and recover from opioid addiction.

Inland Valley Recovery Services

1260 E Arrow Hwy, Upland, CA 91786

4.1 out of 5 (110 reviews)

The Methadone treatment center has a great staff that is organized and helpful. Many reviewers mention that the center helped them achieve long-term sobriety and provided them with a new lease on life. Reviews also highlight the supportive and compassionate staff, as well as the high-quality food and accommodations at the facility.


  • Great staff: The reviews consistently mention the helpful and supportive staff at the Methadone treatment center. This indicates that the staff is knowledgeable, compassionate, and goes out of their way to assist the patients.
  • Clean and organized facility: Multiple reviews highlight the cleanliness and organization of the treatment center. This suggests that the environment is conducive to recovery and promotes a sense of comfort and well-being.
  • Quality of food: Several reviews mention the quality of food provided at the center, describing it as "great" and "top notch." This indicates that the center prioritizes nourishment and ensures that patients are well-taken care of during their stay.

Western Pacific Medical Corporation

10751 Dale Ave, Stanton, CA 90680

4.3 out of 5 (41 reviews)

The Methadone treatment center has received overwhelmingly positive reviews. Patients appreciate the fast and professional service provided by the staff, who are described as respectful, understanding, and caring. The center is praised for helping individuals overcome opioid addiction and improving their lives.


  • The staff members are described as amazing, nice, respectful, and understanding.
  • The service is fast, professional, and efficient, with quick dosing and no groups.
  • The center is described as a life saver and has been successful in helping individuals get off opiates and improve their lives.

BAART Programs Southeast

4920 Avalon Blvd, Los Angeles, CA 90011

4.5 out of 5 (35 reviews)

The Methadone treatment center at Baart Clinic Southeast is highly praised by reviewers. The staff is caring, non-judgmental, and genuinely invested in helping patients overcome addiction. The counselors and medical professionals are readily available and provide personalized support, making patients feel comfortable and motivated throughout the recovery process. Overall, Baart Clinic Southeast has been successful in helping patients achieve sobriety and regain control of their lives.


  • The staff at Baart Clinic Southeast is highly praised for their caring and non-judgmental attitude towards patients.
  • The counselors at the clinic are described as engaged and attentive, making patients feel heard and supported.
  • The clinic's strength-based approach and focus on individual strengths are appreciated by patients.
  • The clinic has helped many individuals achieve sobriety and turn their lives around, making it a recommended option for those struggling with opioid addiction.
  • The staff is described as friendly, motivating, and willing to spend time listening to patients' concerns.
  • The program at Baart Clinic Southeast is highly regarded for its effectiveness and has helped patients achieve long-term recovery.
  • The clinic provides a safe and comfortable environment for patients and fosters a sense of trust and confidentiality.

Western Pacific Medical Clinic

218 E Commonwealth Ave, Fullerton, CA 92832

4.4 out of 5 (30 reviews)

The reviews for this Methadone treatment center are overwhelmingly positive. Many reviewers praise Michelle, a counselor at the center, for her supportive and positive attitude. The staff is described as friendly and helpful, and the clinic is said to be well-run. Overall, it seems like a good place to go for addiction treatment with Methadone.


  • The counselors, specifically Michelle, are highly praised for their positive attitude and personalized treatment approach.
  • The staff is friendly and always willing to help out, creating a supportive environment for patients.
  • The clinic is well-run and offers a smooth experience for patients seeking medication.

Recovery Solutions Of Santa Ana

2101 E 1st St, Santa Ana, CA 92705

4.6 out of 5 (19 reviews)

This Methadone treatment center is highly regarded by reviewers. They offer take-home doses on Saturdays and have friendly staff who prioritize patient care. Some reviewers mention a wait time for dosing, but overall the clinic is described as a great place with effective treatment that has helped people overcome addiction.


  • Convenient take-home dosing on weekends when the clinic is closed.
  • Caring and respectful staff who prioritize your treatment and well-being.
  • Easy and hassle-free guest dosing experience, making it a reliable option for those visiting from out of town.

Colton Comprehensive Treatment Center

2275 E Cooley Dr, Colton, CA 92324

3.4 out of 5 (30 reviews)

The Methadone treatment center at Colton Clinic has received overwhelmingly positive reviews from patients. The staff is praised for their caring and compassionate attitude, willingness to work with patients, and dedication to helping them recover. Some reviews mention specific staff members who have gone above and beyond to provide excellent care. However, a few reviewers mention occasional issues with rude or unhelpful staff members. Overall, the center is highly recommended for individuals seeking recovery and looking to improve their lives.


  • The staff at the center is caring and compassionate, going above and beyond to help patients.
  • The clinic has helpful and knowledgeable dosing nurses who are understanding and willing to work with patients.
  • The clinical director and case managers are personable, accommodating, and work around patients' schedules for appointments.

What is Methadone?

Methadone is a synthetic opioid agonist for Opioid Use Disorder (OUD). Many people in recovery rely on methadone as part of their treatment program.

However,  methadone can be addictive when misused. You should always take methadone under a healthcare professional’s supervision to prevent unwanted side effects.


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How Does Methadone Work?

Methadone binds with brain receptors activated by other opioids like heroin and morphine. It reduces cravings and withdrawal symptoms.

Opioid-dependent people who take methadone don’t experience the same kind of euphoria. One of methadone’s benefits is its long duration of action, allowing it to have a slow onset and prolonged effect.

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Forms of Methadone

Various forms of methadone are available, depending on your treatment plan. Your doctor can also determine the best methadone form suitable for you.

Here are the common forms of methadone:3 

  • Tablet: Methadone tablets are taken orally. You can swallow it whole or mix it in water if it's a dispersible tablet.
  • Liquid: You can also take methadone as a liquid. This is usually prescribed to those with difficulty swallowing tablets or capsules. The liquid concentrate contains 10 milligrams of methadone per milliliter.
  • Injection: Methadone can also be administered as an injection. It’s an alternative for those who can't take oral medication. 

How Long Does Methadone Treatment Usually Last?

It’s recommended to stay on methadone treatment for at least 12 months.

Some may even be on methadone treatment for 20 years.5 This is because opioid addiction is a chronic condition that requires ongoing to prevent relapse. 

Other factors that affect the duration of methadone treatment include:

  • The severity of the addiction
  • Your response to the treatment
  • Overall health 
  • Specific recovery goals

Once you’ve achieved stability, gradually tapering the methadone dose is essential. It helps minimize any withdrawal symptoms.

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Possible Side Effects and Risks of Methadone

Methadone also comes with possible side effects and risks. These side effects will vary for everyone depending on their body’s reaction to the drug.

According to the Substance Abuse and Mental Health Services Administration (SAMHSA), common side effects of methadone include:1

  • Nausea and vomiting
  • Restlessness
  • Slow breathing
  • Itchy skin
  • Heavy sweating
  • Constipation
  • Sexual problems
  • Mood swings 
  • Mental clouding

These side effects and risks are why gradual tapering of methadone is essential. It allows you to adjust to fewer doses, reducing the risk of severe side effects.


Methadone is a synthetic opioid agonist used for opioid use disorder. It binds with opioid receptors in the brain and helps reduce cravings and withdrawal symptoms. 

Methadone can be addictive and has side effects, so you should only take methadone under a professional's supervision. Gradually tapering off the drug also prevents any severe side effects.


  1. “What is Methadone?” Substance Abuse and Mental Health Services Administration (SAMHSA).
  2. "How do medications to treat opioid use disorder work?" National Institute on Drug Abuse, 2021.
  3. "Understanding the Forms of Methadone.” MedMark Treatment Centers. 
  4. "Methadone." The Centre for Addiction and Mental Health, 2021.
  5. Malervy J. "How long should you be on Methadone?" Recovery Centers of America.
  6. "How much does opioid treatment cost?" National Institute on Drug Abuse, 2021. 

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