November 7, 2025
Losing weight is rarely just about willpower. For many people, lifestyle changes alone—diet, exercise, behavior—are not enough to overcome hunger, metabolism, or hormonal issues. That’s where modern weight loss medications come in. When used under medical supervision, they can be powerful tools to help patients meet their goals more safely and effectively.
This blog walks you through some of the leading prescription meds, how they work, pros and cons, and how to choose what might be right for you.
Before diving into specifics, it’s helpful to understand when medications may be indicated:
Medications are not magic pills, but they can help reduce appetite, slow gastric emptying, or modulate hormones that regulate hunger + fullness. Always part of a comprehensive plan.
Here are some of the most commonly used prescription drugs for weight management, along with their essential features.
| Medication | Class / Mechanism | How Administered | Average Weight Loss* | Main Side Effects | Key Advantages |
| Tirzepatide (Zepbound / Mounjaro) | Dual GLP-1 & GIP receptor agonist | Weekly injection | Up to ~20-22% over ~68-72 weeks in obese/overweight without diabetes (highest doses) | Nausea, diarrhea, decreased appetite, and possible abdominal discomfort | Very powerful; strong results. Need to monitor GI side effects; cost and access may be barriers. |
| Semaglutide (Wegovy; Ozempic for diabetes; Rybelsus oral) | GLP-1 receptor agonist | Weekly injection for weight loss; daily/oral forms for diabetes in some versions | ~14-15% in many trials over similar time frames | GI issues (nausea, vomiting, diarrhea), sometimes risk of gallbladder events, and injection site issues | Very well studied; widespread use; multiple formats (oral/injectable) depending on brand. |
| Liraglutide (Saxenda) | GLP-1 receptor agonist | Daily injection | Modest weight loss (~5-10% depending on dose & duration) | Similar GI side effects, needs daily injections, and a more frequent dosing burden. | Good option if weekly injections are not tolerated; experience over many years. |
| Phentermine-Topiramate (Qsymia) | Appetite suppressant + neurological modulation | Oral daily capsule | ~7-11% depending on dose, lifestyle, patient adherence | Tingling sensations, possible insomnia, dry mouth, mood changes, birth-defect risk if pregnant | Strong effectiveness for some; oral route; requires careful screening (e.g., pregnancy, psychiatric history). |
| Naltrexone-Bupropion (Contrave / Mysimba) | Modulates reward & appetite centers in brain | Oral daily | ~5-9% average weight loss in many patients | Nausea, headache, risk of increased blood pressure, and seizures in predisposed individuals. | Helps especially with emotional eating/cravings; behavioral support key. |
| Orlistat (Xenical / Alli) | Reduces fat absorption in the gut | Oral, with meals | More modest (~3-5%), especially if dietary fat remains high, still helpful for some users. | Steatorrhea (greasy stools), flatulence, and potential fat-soluble vitamin deficiency. | Over-the-counter versions exist; they are useful when injections are not possible; diet quality very important. |
* “Average weight loss” numbers are from clinical trials in appropriate patients; individual results vary widely depending on adherence, dose, duration, lifestyle, etc.
At Reem Hospital, our physicians consider:
In addition to FDA-approved weight loss medications, some patients may hear about or be offered Botox (botulinum toxin) injections into the stomach as a method to support weight management.
Weight loss medications have become a transformative option for many individuals struggling with obesity or being overweight, especially when lifestyle changes alone aren’t enough. The most powerful medications (like GLP-1 receptor agonists such as tirzepatide and semaglutide) offer large weight losses, while others provide incremental help with fewer side effects or simpler administration.
At Reem Hospital, our approach is personalized: matching the right medication to each patient’s health profile, preference, and lifestyle. If you think you may benefit from a prescription aid in weight loss, reach out to our endocrinology clinic. We’ll help you understand the options and start a plan that’s safe, realistic, and sustainable.
Reference: FDA