GLP-1 vs Other Weight Loss Medications: What's the Difference?

GLP-1 medications are not the only prescription option

When people start researching prescription weight-loss treatment, GLP-1 medications often dominate the conversation. But they are not the only option. Depending on your health history, goals, side-effect tolerance, and budget, another medication or combination approach may be worth discussing with your clinician.

This article compares GLP-1 therapy with other common prescription approaches so you can ask better questions at your appointment.

What makes GLP-1 medications different?

GLP-1 medications work mainly by reducing appetite, increasing fullness, and affecting how quickly the stomach empties. Some also improve blood sugar control. For many patients, that appetite-related effect is what makes them feel different from older medications.

Clinical trials suggest GLP-1 medications can produce meaningful weight loss for many patients, but individual results vary and they are not automatically the best fit for everyone.

Other prescription weight-loss medications you may hear about

Phentermine

Phentermine is a stimulant-like appetite suppressant generally intended for short-term use in appropriate patients.

Potential advantages:

• Often less expensive than newer medications
• May reduce appetite quickly for some people

Important trade-offs:

• Can raise heart rate or blood pressure
• May worsen anxiety, insomnia, or palpitations
• Not appropriate for everyone

Phentermine/topiramate

This combination medication may support appetite reduction and weight loss over a longer period in some patients.

Potential advantages:

• Oral option
• Can be effective for some people

Important trade-offs:

• Side effects may include tingling, dry mouth, mood changes, or cognitive slowing
• Requires careful review in people who could become pregnant because of fetal risk

Naltrexone/bupropion

This combination can affect appetite and cravings and may be considered for some patients.

Potential advantages:

• Oral option
• May help certain eating patterns or cravings in some individuals

Important trade-offs:

• May worsen nausea in some people
• Not appropriate for people with certain seizure risks, eating disorders, or some psychiatric considerations

Orlistat

Orlistat works differently by reducing fat absorption in the gut.

Potential advantages:

• Available as prescription or lower-dose over-the-counter forms
• Not a stimulant

Important trade-offs:

• Can cause gastrointestinal side effects, especially with higher-fat meals
• Weight-loss effect is often more modest than with newer therapies

Comparing GLP-1s to older medications

Appetite and food noise

GLP-1 medications may be especially helpful for patients whose biggest struggle is persistent hunger, fullness cues, or constant food preoccupation. Older medications may help too, but often through different mechanisms and with different side-effect profiles.

Average weight-loss potential

Studies suggest GLP-1 medications often produce greater average weight loss than older anti-obesity medications. That does not mean they are always the best first choice. Side effects, contraindications, access, and sustainability matter.

Route and routine

Many GLP-1 medications are injections, while several older medications are pills. Some patients strongly prefer one form over the other.

Cost and access

Older medications are often more affordable. GLP-1 medications may be much more expensive without insurance coverage, and coverage varies by plan.

Questions that help determine fit

A medication discussion should include:

• Your blood pressure and cardiovascular history
• History of anxiety, insomnia, or palpitations
• Diabetes or prediabetes status
• Pregnancy plans
• GI tolerance and medical history
• Budget and insurance coverage
• What has or has not worked for you before

When GLP-1 may not be the obvious answer

GLP-1 treatment may not be the best first step if:

• Cost is a major barrier and coverage is unavailable
• You cannot tolerate GI side effects
• You have a contraindication
• Another medication better matches your medical profile or goals

Final takeaway

GLP-1 medications are important tools, but they are part of a larger treatment landscape. The right prescription plan depends on your health profile, side-effect tolerance, access, and long-term strategy.

A good clinician should explain options clearly instead of treating one medication as the answer for everyone.

This article is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any medication.