At a glance: OC Weight Loss & Med Spa offers a physician-supervised managed weight loss program in Mission Viejo, CA. Each plan is individualized after a one-on-one medical consultation and may include prescription medications, nutritional guidance, and ongoing monitoring. Results depend on individual health status and adherence. Candidacy for specific treatments is determined at your consultation.
Medically reviewed by the clinical team at OC Weight Loss and Med Spa. Last updated: June 12, 2026.
What Is a Managed Weight Loss Program?
A managed weight loss program is a structured, clinician-directed approach to losing weight that goes beyond generic diet plans. Rather than a one-size-fits-all protocol, it begins with a thorough medical evaluation to understand your history, current health, and the factors making weight loss difficult for you specifically.
At OC Weight Loss & Med Spa in Mission Viejo, that evaluation leads to a personalized plan — which may include FDA-approved prescription medications, nutritional counseling, and scheduled follow-up visits to track progress and adjust your protocol over time.
How the Program Works at Our Clinic
The program is overseen by Dr. Nezar Dahdal, MD, a board-certified Internal Medicine physician, and delivered in partnership with Lindsay Short, NP, a board-certified Nurse Practitioner (UCLA, Columbia MSN). Every patient starts with a comprehensive intake visit before any treatment is recommended.
Step 1: Medical Consultation
Your initial visit includes a review of your medical history, current medications, and weight history, along with baseline vitals and body composition measurements. This information guides every recommendation that follows.
Step 2: Individualized Treatment Plan
Based on your consultation, your provider may recommend one or a combination of the following approaches:
- Prescription appetite suppressants — such as phentermine, used short-term under close supervision to help reduce caloric intake
- GLP-1 receptor agonists — including semaglutide or tirzepatide, which act on hunger and satiety signaling; candidacy is assessed individually
- Vitamin B-12 injections — for patients who are deficient; B-12 supports energy metabolism and red blood cell production
- Nutritional and lifestyle guidance — practical, evidence-based recommendations tailored to your schedule and preferences
Step 3: Ongoing Monitoring and Adjustments
Regular follow-up appointments allow your provider to assess progress, review labs when indicated, and modify your plan. Consistent monitoring is a defining feature of medical weight management — and what distinguishes it from self-directed dieting.
Realistic Expectations
In clinical trials, medically supervised weight loss programs produce meaningful reductions in body weight for many participants. Individual results vary based on starting weight, adherence, underlying health conditions, and which treatment approach is used. Your provider will give you a realistic picture of what to expect during your consultation — not a guarantee, but an honest assessment based on your situation.
Safety, Side Effects, and Who Should Not Use This Program
Medical weight loss treatments are effective for many patients, and they carry real considerations that your provider will discuss with you before prescribing anything.
Prescription Appetite Suppressants (e.g., Phentermine)
Phentermine is a Schedule IV controlled substance approved for short-term use (typically up to 12 weeks). Common side effects include increased heart rate, elevated blood pressure, dry mouth, insomnia, and restlessness. It is contraindicated in patients with cardiovascular disease, uncontrolled hypertension, hyperthyroidism, glaucoma, or a history of drug abuse, and should not be used during pregnancy.
GLP-1 Receptor Agonists (e.g., Semaglutide, Tirzepatide)
GLP-1 medications carry a boxed warning regarding a potential risk of thyroid C-cell tumors observed in rodent studies; their relevance to humans is not established, but these medications are contraindicated in patients with a personal or family history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia syndrome type 2. Common side effects include nausea, vomiting, diarrhea, and constipation, especially during dose escalation. They are not indicated during pregnancy.
General Program Candidacy
Not every treatment is appropriate for every patient. Your provider will review your full medical history — including current medications for potential interactions — before making any recommendation. Transparency about your health history at your consultation is essential to a safe outcome.
Frequently Asked Questions
Do I need a referral to start the program?
No referral is required. You can schedule a free consultation directly with our office to discuss whether the program is right for you.
How long does the program last?
Program length depends on your goals and which treatments are appropriate for you. Some prescription medications are intended for short-term use, while other components — such as nutritional guidance and monitoring — may continue throughout your weight loss and maintenance phases. Your provider will outline a realistic timeline at your initial visit.
Is this program covered by insurance?
Coverage varies by plan. We offer flexible financing through Cherry, CareCredit, and Alle to help make care accessible. Our team can help you understand your options before you commit.
What makes this different from a commercial diet program?
Commercial programs are not supervised by a licensed medical provider and cannot prescribe medications or order labs. Our program is physician-supervised: treatments are selected based on your individual health picture, monitored with follow-up visits, and adjusted based on clinical response — not a fixed calendar.
Where is the clinic located?
We are located at 24002 Via Fabricante, Suite 201, Mission Viejo, CA 92691. Office hours are Monday through Friday, 9 am to 5 pm, and Saturday, 9 am to 1 pm. You can reach us at (949) 416-0950.
Schedule a Free Consultation
If you are ready to explore a medically supervised approach to weight loss, the first step is a no-obligation consultation with the team at OC Weight Loss & Med Spa. Your provider will review your history, answer your questions, and explain which options are appropriate for your situation.
Book a free consultation
Book a Free Consultation