Quick summary: OC Weight Loss & Med Spa in Mission Viejo, CA offers supervised medical weight loss programs tailored to your health history and goals. Options include FDA-approved appetite suppressants, GLP-1 receptor agonists, and structured lifestyle coaching. A licensed medical provider assesses your candidacy at a free consultation. Individual results vary.
Medically reviewed by the clinical team at OC Weight Loss & Med Spa. Last updated: June 12, 2026.
What is medical weight loss?
Medical weight loss is a clinician-supervised approach to reducing body weight. It differs from commercial diet programs because a licensed provider evaluates your health before recommending any treatment. That evaluation shapes the plan — no two patients leave with identical recommendations.
At OC Weight Loss & Med Spa, Lindsay Short, NP (board-certified Nurse Practitioner) leads patient care under the physician supervision of Dr. Nezar Dahdal, MD (board certified, Internal Medicine). The clinic is located at 24002 Via Fabricante #201, Mission Viejo, CA 92691.
Weight loss programs offered at the clinic
The clinic’s medical weight loss program can include one or more of the following, depending on your evaluation:
- Phentermine: An FDA-approved prescription appetite suppressant in the sympathomimetic amine class. Typically prescribed for short-term use alongside diet and exercise. See the phentermine page for more detail.
- GLP-1 receptor agonists: A class of injectable medications (including semaglutide) that slow gastric emptying, reduce appetite, and support blood sugar regulation. The GLP-1 page explains how these work and what candidacy looks like.
- Structured lifestyle coaching: Nutritional guidance and behavioral support are integrated into every program. Medication alone is not prescribed without this framework.
The provider selects the approach based on your weight history, current medications, cardiovascular status, and other clinical factors reviewed at intake.
What realistic progress looks like
Medically supervised programs consistently outperform self-directed dieting in controlled studies, but results depend on adherence, starting health status, and which treatment is appropriate for you. In clinical trials, patients on GLP-1 medications typically achieved meaningful body weight reduction over 16–68 weeks alongside lifestyle intervention. Phentermine studies show short-term appetite suppression that can support initial habit change.
At OC Weight Loss & Med Spa, providers set clear expectations at the first visit. Individual results vary. Weight loss is not guaranteed, and the program is designed to be sustainable rather than rapid.
Safety, side effects, and who should not use these treatments
All treatments carry risks. The following is a general overview — not a substitute for the clinical assessment at your consultation.
Phentermine
- Phentermine is a Schedule IV controlled substance. It is intended for short-term use (typically up to 12 weeks) and should not be used long-term without close medical oversight.
- Common side effects include dry mouth, insomnia, elevated heart rate, and increased blood pressure.
- Phentermine is contraindicated for patients with cardiovascular disease, uncontrolled hypertension, hyperthyroidism, glaucoma, history of drug abuse, or those who are pregnant or nursing.
- It should not be combined with MAO inhibitors or other stimulants.
GLP-1 receptor agonists
- Common side effects include nausea, vomiting, diarrhea, and constipation, particularly during dose escalation. These typically improve over time.
- GLP-1 medications carry an FDA boxed warning related to thyroid C-cell tumors observed in rodent studies. They are contraindicated in patients with a personal or family history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia syndrome type 2.
- These medications are not approved for use during pregnancy.
- Pancreatitis has been reported; patients with a history of pancreatitis should discuss this risk explicitly with their provider.
Candidacy for any treatment at OC Weight Loss & Med Spa is determined at consultation by the medical provider after reviewing your full health history.
Frequently asked questions
How do I know which weight loss program is right for me?
The provider reviews your health history, current medications, weight history, and goals during your initial consultation. Based on that assessment, they recommend the most appropriate approach. You are not locked into any treatment before that conversation.
How long does a medical weight loss program last?
Duration depends on the treatment and your progress. Phentermine is typically short-term (weeks to a few months). GLP-1 programs often run longer and include regular check-ins to adjust dosing. The clinic monitors your progress and adjusts the plan as needed.
Do I need a referral to book a consultation?
No referral is required. You can book a free consultation directly through the clinic’s online scheduler or by calling (949) 416-0950. The clinic is open Monday through Friday 9 am–5 pm and Saturday 9 am–1 pm.
Does insurance cover medical weight loss?
Coverage varies by plan. The clinic offers financing through Cherry and CareCredit to help make programs accessible. Ask the team about current options at your consultation.
Is this program only for people with a lot of weight to lose?
Medical weight loss programs are typically appropriate for adults with a BMI of 27 or higher with a weight-related health condition, or a BMI of 30 or higher. Your provider will assess this at consultation and explain whether you are a candidate for prescription treatment versus a structured lifestyle program.
Schedule a free consultation
OC Weight Loss & Med Spa serves patients throughout Mission Viejo and the surrounding South Orange County area. The first step is a free consultation with a licensed provider who will review your health history and explain your options — no obligation to proceed. To get started, call (949) 416-0950 or book online below.
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