Medical Weight Loss in Des Plaines: A Physician’s Guide to GLP-1s — How Semaglutide and Tirzepatide Work, How They Are Dosed, What the Side Effects Really Are, Compounded Versus Brand, Who Should and Should Not Take Them, and What Happens When You Stop
By Dr. Naaz Aziz, MD, Board-Certified Family Medicine Physician · Zorah Express Medical Care, Des Plaines, IL · Updated September 2026
Zorah Express Medical Care — physician-supervised GLP-1 weight loss and primary care — 1645 S River Road, Suite 14, Des Plaines, IL 60018, River Plaza Professional Building. Open Monday through Saturday from nine until five. (708) 412-4040 · book a GLP-1 consultation online.
Quick answer: GLP-1 drugs — for weight loss the two that matter are semaglutide and tirzepatide — are weekly injections that copy a gut hormone to slow digestion, steady blood sugar, and quiet appetite. Taken under a physician’s supervision with the dose raised in monthly steps, they produce average losses in the range of fifteen percent of starting weight for semaglutide and beyond twenty for tirzepatide over a year or more, with side effects that are mostly digestive, dose-related, and manageable. They are off the table for anyone whose own or family history includes medullary thyroid cancer or MEN2, and during pregnancy, and they require labs up front and a plan for the day you stop, because stopping without one returns most of the weight. This is the medication guide I give my patients in Des Plaines; the program, the pricing, and the month-by-month timeline live on our medical weight loss program page.
What a GLP-1 Actually Does in Your Body
GLP-1 stands for glucagon-like peptide-1, a hormone your small intestine releases after you eat. It does three things at once: it tells the pancreas to release insulin when blood sugar rises, it slows how fast the stomach empties, and it signals the brain’s appetite centers that you are full. In most people with obesity that signal is weak or short-lived, which is why the willpower explanation fails — the body is arguing back, hormonally, every hour. A GLP-1 receptor agonist is a synthetic version of that hormone built to last a week instead of minutes. It restores the fullness signal, slows the stomach so meals satisfy longer, and, as patients describe it within the first two weeks, turns off the “food noise” — the constant background thinking about eating. Weight comes off because you eat less without fighting to, and because blood sugar and insulin stop swinging.
The Medications: Semaglutide, Tirzepatide, and the Rest
Semaglutide is a pure GLP-1 agonist, injected once weekly. It is sold as Wegovy for chronic weight management and as Ozempic for type 2 diabetes — the same molecule, different approved doses and labels. The STEP 1 trial put the average loss in non-diabetic adults at roughly fifteen percent of starting weight across 68 weeks. It is the drug inside both of our packaged programs and the one most Des Plaines patients start on.
Tirzepatide activates two receptors, GLP-1 and GIP, and is also weekly. It is Zepbound for weight management and Mounjaro for diabetes. SURMOUNT-1 recorded losses reaching 22.5 percent at the top dose across 72 weeks, the biggest result any weight-loss drug has posted in a trial. It tends to be somewhat better tolerated at equivalent effect and is my choice for patients who plateau on semaglutide, cannot tolerate it, or start at a higher weight with more to lose.
Liraglutide (Saxenda) is the older daily injection; it works, loses less, and is now mostly used when the weekly drugs are unavailable or not tolerated. Oral GLP-1s are coming — tablet forms are in late development and early availability — and I will prescribe them when the evidence and the supply are solid; today the weekly injections remain the standard because their results are proven.
How the Dose Is Raised, and Why Slowly
Every GLP-1 starts low and climbs. Semaglutide begins at 0.25 mg weekly for four weeks, then 0.5, 1.0, 1.7, and 2.4 mg, each step held about a month; the full maintenance dose is reached around week 17. Tirzepatide starts at 2.5 mg and rises in 2.5 mg steps every four weeks toward 15 mg. The slow climb is not caution for its own sake — it is what separates the patient who stays on the drug from the one who quits in week three. Nausea, fullness, and constipation come from the stomach slowing down, and the gut adapts to each dose if it is given time. At Zorah the schedule is written out at the first visit, the dose is adjusted at follow-ups based on how you feel and what the scale says, and a patient who is losing well and feeling well on a middle dose does not have to climb to the top one.
Side Effects: What Is Normal, What to Manage, What to Call About
Normal and temporary: mild nausea in the first days after a dose increase, early fullness, burping, constipation or loose stools, fatigue. These are managed with smaller meals, eating slowly, stopping when full, water, fiber, and a dose held steady an extra month if needed. Most patients describe them as fading by the second or third week of each step.
Manage actively: heartburn (avoid large late meals; an acid reducer if needed), constipation lasting more than a few days (fiber, magnesium, hydration), and the appetite drop that becomes under-eating — protein and hydration have to be deliberate, or the weight that comes off includes too much muscle. I ask every patient to hit a protein target and keep resistance exercise in the week; nothing else you do matters as much for making the loss fat rather than muscle. A low-calorie stretch can also show in the face, which is not a drug effect but a weight-loss effect and is the reason a slower loss is often the better one.
Call the clinic the same day: severe or persistent abdominal pain (pancreatitis and gallbladder problems are uncommon but real), vomiting that will not stop, signs of dehydration, a lump or hoarseness in the neck, or symptoms of low blood sugar in a patient also on insulin or a sulfonylurea. These are the reasons the medication is prescribed by a physician who examines you and not by a form.
Compounded Versus Brand: The Honest Version
During the shortage years, compounding pharmacies made semaglutide and tirzepatide legally available while the brand pens were not, and a great deal of what is sold online today is still compounded. Compounded means the active ingredient is prepared by a pharmacy rather than the manufacturer; it is not FDA-approved as a product, its quality depends entirely on the pharmacy, and the FDA has issued repeated warnings on counterfeit and badly made semaglutide, including products that were the wrong salt form or the wrong strength. That does not make all compounded medication unsafe. It makes the pharmacy the question. At Zorah I will tell you exactly which product you are receiving — brand or compounded — and, if compounded, which pharmacy, what its accreditation is, and why I trust it. If a clinic will not answer that question, you have your answer about the clinic. Our peptide therapy page covers the broader category and sourcing.
Who Qualifies, and Who Cannot Take a GLP-1
You qualify with a BMI at or above 30, or at or above 27 when a weight-linked condition is present — prediabetes or diabetes, hypertension, elevated cholesterol, obstructive sleep apnea, PCOS, fatty liver disease, or weight-bearing joint disease. Many patients qualify without knowing it. The medications are contraindicated where medullary thyroid carcinoma or MEN2 appears in the patient’s or the family’s history — that is the boxed warning — and are avoided or used with great care in patients with a history of pancreatitis, severe gastroparesis, significant gallbladder disease, or diabetic retinopathy, and in pregnancy, breastfeeding, or anyone planning a pregnancy in the next two months. Two interactions come up every week: a patient taking insulin or a sulfonylurea needs those doses lowered so blood sugar does not drop too far, and because the stomach empties slowly, oral medications with narrow timing — and, with tirzepatide, oral contraceptives — may be absorbed less predictably; women on the pill use a backup method for four weeks after starting tirzepatide and after each dose increase. This is why the first visit includes a full medication and history review, not a checkbox.
The Labs I Order Before the First Dose, and Why
Fasting glucose and A1c, to know the starting point and catch prediabetes or diabetes; fasting insulin; cholesterol and triglycerides; TSH for the thyroid; liver enzymes and kidney function, since both bear on dosing and safety; vitamin D and B12, which are commonly low and get lower when intake drops. The results decide the medication, the starting dose, and what else we treat. It is routine for a GLP-1 workup to find a thyroid problem or blood pressure that needs its own plan — and because this is a family medicine practice, that plan is written in the same visit through our diabetes care and chronic disease management, not referred out.
What Happens When You Stop
The question every honest guide has to answer. In the STEP 4 trial, patients who stopped semaglutide regained roughly two-thirds of the weight they had lost within a year; appetite returns because the hormone signal is gone. That is not a reason to avoid the medication — it is the same truth as blood pressure medication — but it is a reason to plan the end before the beginning. The options are continuing at the lowest effective dose, tapering while the habits built during the loss are tested, or transitioning off with a maintenance plan of protein, resistance training, and follow-up weigh-ins. Which one fits you depends on your history and how your body responded, and it is a decision we make together at a visit, not one a subscription makes for you when the card declines.
Before You Choose a Clinic
Whatever clinic you use, the standard is the same: a physician who examines you and reads your labs before prescribing, a stated medication source, a written all-inclusive price, scheduled follow-up, and a plan for stopping. The verification steps — the Illinois license lookup, board certification, FDA warning letters — are laid out in our guide to choosing a medical clinic in Chicago and apply word for word here. My credentials are on the meet the doctor page: board-certified in family medicine, trained in residency at UIC, and 17-plus years in practice.
How This Works at Zorah in Des Plaines
You come in, I examine you and take the history, we draw labs, and at the follow-up we choose the medication and the starting dose together. Weekly semaglutide injections are $110, and our three-month programs — $949 with labs and monthly B12, or $1,250 with labs, methylcobalamin B12, Lipo Plus, and Amino Blend — are on the medical weight loss service page. Tirzepatide is priced by dose. We are in River Plaza on River Road, ten to twenty minutes from Park Ridge, Niles, Rosemont, Mount Prospect, Arlington Heights, Schaumburg, and the Northwest Side of Chicago, with Saturday hours, carrying a 4.9 Google rating over 69 reviews, and taking new patients with no referral. Patients in the nearby towns can start from their own page: Park Ridge, Niles, Rosemont, Mount Prospect, Arlington Heights.
GLP-1 Questions My Des Plaines Patients Ask
What is the difference between semaglutide and tirzepatide?
Semaglutide activates one receptor (GLP-1); tirzepatide activates two (GLP-1 and GIP). Tirzepatide produced more weight loss in trials — up to 22.5 percent versus about 15 — and is often better tolerated at equal effect. Most patients start on semaglutide; tirzepatide is used for plateaus, intolerance, or higher starting weights.
Is Ozempic the same as Wegovy?
Same molecule, semaglutide. Wegovy is approved for weight management at doses up to 2.4 mg; Ozempic is approved for type 2 diabetes. The same is true of Zepbound and Mounjaro for tirzepatide.
Is compounded semaglutide safe?
It can be, if the pharmacy is reputable and accredited; it carries no FDA approval as a product, and federal warnings about counterfeit and mis-made versions are on record. Ask any clinic which product and which pharmacy; we tell you.
How long before I see results?
Appetite shifts inside the first two weeks; the scale moves within a month; the loss becomes steady over the second and third months as the dose steps up. Full maintenance doses are reached around four months.
What are the most common side effects?
Nausea, fullness, constipation, and fatigue in the days after a dose increase, fading as the gut adapts. Severe abdominal pain, persistent vomiting, or neck lumps are call-the-clinic symptoms.
Who cannot take a GLP-1?
Anyone whose own or family history includes medullary thyroid cancer or MEN2; anyone pregnant or breastfeeding; and, with caution or not at all, prior pancreatitis, severe gastroparesis, or serious gallbladder disease.
Will I lose muscle?
Some of any weight lost is lean mass. A daily protein target and resistance exercise two or three times a week keep it to a minimum, and a slower rate of loss protects muscle better than a fast one.
What happens when I stop?
Without a plan, most of the weight returns within a year. With one — a low maintenance dose, a taper, or a structured transition off — the result can be kept. We plan the end at the beginning.
Does insurance cover GLP-1s for weight loss?
Often for diabetes, less often for weight alone, and always plan by plan. The visit and the labs are generally billed as ordinary medical care; the three-month packages are priced as self-pay for anyone whose plan will not cover the drug.
How do I start in Des Plaines?
Book online or call (708) 412-4040; no referral is needed. The first visit is the exam, history, and labs; the second is the plan and the first dose.
Start With the Exam, Not the Pen
The medication works. What decides whether it works for you, safely, and for good is everything around it — the labs, the dose plan, the follow-up, and the physician who knows the rest of your health. Schedule a GLP-1 visit online with Dr. Aziz or call (708) 412-4040. Saturday appointments are available.
Every GLP-1 has risks and exclusions that vary by patient. Nothing here replaces an in-person evaluation; the decision to prescribe belongs to a licensed physician who has examined you and reviewed your history and labs. STEP 1, STEP 4, and SURMOUNT-1 figures describe trial populations and are not a promise of individual results.
