Written by Klarity Editorial Team
Published: Oct 11, 2025
If you’re one of the millions using GLP-1 medications like Tirzepatide, Semaglutide, or Ozempic for weight management, you may be experiencing an unwelcome side effect: persistent fatigue. While these medications have revolutionized weight loss treatment, the energy drain many users report can be challenging. This comprehensive guide explores the relationship between GLP-1 medications and energy levels, examining everything from expensive NAD injections to practical dietary adjustments that might help you regain your vitality.
GLP-1 receptor agonists like Tirzepatide work by slowing gastric emptying and reducing appetite—effects that contribute to weight loss but may also impact your energy in several ways:
The most straightforward explanation for fatigue on GLP-1 medications is the significant caloric deficit these drugs create. When your body consumes fewer calories than it burns, energy levels naturally decline as a biological response.
‘Many patients don’t realize that their fatigue might simply be due to consuming significantly fewer calories,’ explains Dr. Sarah Chen, an endocrinologist at Klarity Health who specializes in weight management. ‘Before exploring expensive supplements, we typically recommend examining nutrition and ensuring adequate protein intake.’
Reduced food intake can lead to electrolyte imbalances, particularly potassium, magnesium, and sodium—all crucial for muscle function and energy production.
Some GLP-1 users experience nausea or digestive issues that reduce fluid intake, leading to dehydration that manifests as fatigue.
Nicotinamide Adenine Dinucleotide (NAD) injections have gained popularity among GLP-1 medication users seeking energy solutions. But at $200-500 per treatment, are they worth the investment?
NAD is a coenzyme present in all cells that plays a crucial role in metabolic functions and energy production. As we age, NAD levels naturally decline, which has led to interest in NAD supplementation for both energy and anti-aging benefits.
While NAD is undoubtedly important for cellular function, the evidence for injectable NAD as a fatigue treatment specifically for GLP-1 medication users remains largely anecdotal. Most clinical studies have focused on NAD precursors like NMN or NR in oral form, not injections.
| Factor | NAD Injections | Oral Niacinamide (Vitamin B3) ||——–|—————|——————————|| Cost | $200-500 per treatment | $10-30 per month || Delivery | Intravenous or intramuscular injection | Oral supplement || Bioavailability | Immediate delivery to bloodstream | Lower, must be converted by body || Convenience | Requires clinic visit | Take at home || Scientific evidence for GLP-1 fatigue | Limited, mostly anecdotal | Limited, but some evidence for general fatigue || Side effects | Potential injection site reactions, flushing | Minimal at appropriate doses |
‘While NAD injections provide immediate delivery to the bloodstream, there’s little evidence they’re significantly superior to oral niacinamide for most patients,’ notes Dr. Chen. ‘Many patients at Klarity Health find that addressing nutritional basics provides similar benefits at a fraction of the cost.’
If basic interventions aren’t helping, some users do report benefits from more intensive treatments:
NMN (Nicotinamide Mononucleotide) and NR (Nicotinamide Riboside) are oral supplements that convert to NAD in the body and may provide similar benefits to injections at lower cost.
Some users find relief with comprehensive IV therapies that address multiple deficiencies simultaneously.
‘Sometimes the solution is as simple as adjusting your GLP-1 medication dosage or schedule,’ explains Dr. Chen. ‘At Klarity Health, we work closely with patients to fine-tune their treatment plan if fatigue is significantly impacting quality of life.’
The experience of fatigue on GLP-1 medications varies widely among users. What works for one person may not work for another, making personalized guidance valuable.
‘We see many patients who have tried expensive treatments without addressing the fundamentals first,’ says Dr. Chen. ‘Our approach at Klarity Health begins with comprehensive testing and basic interventions before considering more expensive options like NAD therapy.’
Many users report that fatigue diminishes after 4-8 weeks as the body adapts to both the medication and reduced caloric intake.
Typically no. Most insurance plans consider NAD injections experimental and don’t provide coverage.
Most basic supplements are safe, but always consult with your healthcare provider before starting any new supplement, especially stimulant-based products.
Not necessarily. Fatigue is a common side effect that can often be managed. Consult with your provider before discontinuing any prescribed medication.
If you’re struggling with fatigue while taking Tirzepatide or other GLP-1 medications, consider scheduling a consultation with a weight management specialist who understands these medications and their effects. Providers at Klarity Health offer personalized approaches to managing GLP-1 side effects with transparent pricing and both insurance and self-pay options.
Remember that sustainable weight management should enhance your quality of life—not diminish it through unmanageable side effects. With the right support and strategies, you can achieve your weight management goals while maintaining the energy you need for daily life.
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