Does Semaglutide Make You Tired? Managing Semaglutide Fatigue

Starting semaglutide can feel like a turning point in your weight loss journey, until the unexpected wave of fatigue hits. If you’ve found yourself needing extra naps, struggling to focus, or feeling unusually drained during the day, you’re not alone. After digestive symptoms like nausea, fatigue is one of the more commonly reported side effects of semaglutide.

Semaglutide (Ozempic or Wegovy) is an FDA-approved injectable medication for type 2 diabetes (Ozempic) and weight loss (Wegovy). It helps control blood sugar, promotes weight loss, and reduces the risk of diabetes-related conditions like heart attack, kidney disease, and stroke. 

Semaglutide works by acting as a glucagon-like peptide-1 receptor (GLP-1) agonist. It prevents your liver from producing excess sugar and stimulates your pancreas to release more insulin. This helps in blood sugar management. It also slows stomach emptying, which may prolong feelings of fullness and decrease appetite. These mechanisms of action may be among the reasons why you are tired on semaglutide.

The good news is that this fatigue is temporary and improves as your body adjusts. Understanding why it happens and how to manage it can help you stay consistent and feel better faster.

Does Semaglutide Cause Fatigue?

Semaglutide can make you tired, especially when you first start taking it. This is often called “semaglutide fatigue.” While it is not as commonly discussed as nausea or other gastrointestinal side effects, many people taking Wegovy, Ozempic, or Rybelsus have reported feeling unusually tired, especially in the first few weeks of treatment.

Clinical trials for semaglutide have documented fatigue as a possible side effect, though it occurs in fewer users. People taking Wegovy reported fatigue as a common side effect, with 11% of users experiencing it. In comparison, fewer than 5% of people using Ozempic reported fatigue, whereas none did with Rybelsus.

While clinical trials reported a low rate of fatigue, real-world patient experiences suggest it may be more common, especially when starting semaglutide or increasing the dose.

However, fatigue resolves within about two weeks as your body adjusts.

Why Does Semaglutide Make You Tired?

Semaglutide may cause fatigue due to its mechanisms of action, including appetite suppression, blood sugar control, and gastrointestinal side effects. 

1. Blood sugar changes

Semaglutide may have an impact on your blood sugar levels because it’s used to treat type 2 diabetes. If you don’t have diabetes, your blood sugar may fall below normal, causing a drop in energy levels. Hypoglycemia, or low blood sugar, can make you feel tired, weak, and lightheaded. This is especially true if you skip meals, consume inadequate amounts of carbs, or go long periods without eating, as the appetite-suppressing effects of semaglutide can make you feel full.

While research suggests that semaglutide has a low risk of low blood sugar, the risk is higher if you also use insulin or other diabetes treatments, such as sulfonylurea drugs. 

2. Dehydration and electrolyte imbalance

The slower digestion effects of semaglutide can sometimes cause gastrointestinal side effects like nausea, vomiting, or diarrhea, which occur mostly when you first start the medication or increase your dose. These side effects can lead to fluid loss, which, if not properly managed, can result in dehydration and an imbalance in electrolytes like sodium and potassium.

The National Library of Medicine states that one effect of dehydration is fatigue. You may feel physically and mentally sluggish if you don’t drink enough water.

3. Nutrient deficiency

A reduced appetite can sometimes lead to unintentional meal skipping or inadequate intake of essential nutrients, such as iron, B vitamins, and magnesium, which are crucial for energy production. However, it’s also possible that a vitamin deficiency was already present before starting the medication. Fatigue could be a sign that your body is lacking key nutrients.

If you’re feeling unusually tired, it might be worth asking your doctor to check your vitamin levels.

4. Caloric deficit

Semaglutide helps with weight loss by reducing appetite, often leading to fewer calories consumed. While this caloric deficit is essential for shedding pounds, it can also lead to fatigue, weakness, and brain fog due to reduced energy intake.

Caloric needs vary based on factors like activity level, age, and metabolism. However, general guidelines suggest that individuals assigned female at birth (AFAB) may require around 2,000 calories per day to maintain weight and 1,500 for weight loss, while those assigned male at birth (AMAB) may need about 2,500 to maintain and 2,000 for weight loss.

When starting on semaglutide, you may undereat, consuming fewer calories than your body was used to. This can affect your energy levels, leading to physical and mental tiredness and impairing your daily functioning.

5. Other underlying medical conditions 

Your fatigue may be connected to other medical conditions, like sleep apnea, hypothyroidism, anxiety disorders, depression, diabetes, or fibromyalgia. This may improve and resolve when these conditions are diagnosed and treated.

How Long Does Semaglutide Fatigue Last?

Semaglutide fatigue varies from person to person, but for most, it is temporary and usually subsides within a few weeks as your body adjusts to the medication. Most people report feeling better within the first 2 to 6 weeks of starting treatment.

To help your body adjust to semaglutide, your healthcare provider will start you at a lower dosage and gradually increase it over time. 

You’ll start with a low dose of 0.25 mg per week for the first four weeks. Then your dose may increase to 0.5 mg, then 1 mg, and eventually up to the maximum maintenance dose of 2 mg for Ozempic or 2.4 mg for Wegovy. 

It’s worth noting that semaglutide side effects like nausea, reduced appetite, or vomiting are often most common during the dose increase and can contribute to feelings of tiredness. As your body adjusts to the medication and you reach your maintenance dose, these side effects may improve. So, if you’re feeling tired when you first start semaglutide, there’s a good chance your fatigue will disappear as your body gets used to the treatment.

How to Manage Fatigue While Taking Semaglutide

Semaglutide fatigue can make you feel like stopping your treatment. But several tips can help you manage it.

1. Stay hydrated

Fatigue is one of the first signs that your body is dehydrated. Sip water throughout the day. While individual needs vary, the Institute of Medicine recommends that men aim for about 15 cups of fluids daily, while women aim for about 12 cups. In addition to water and drinks like tea, coffee, and juices, you may also get your fluids from fruits and vegetables that are high in water content (up to 90%), such as melons, cucumbers, zucchini, squash, strawberries, and citrus fruits.

2. Eat nutrient-dense foods

Since semaglutide reduces appetite, focusing on nutrient-dense foods is important to ensure your body gets the vitamins and minerals it needs for sustained energy. Include proteins, healthy fats, and complex carbohydrates to provide steady energy and prevent blood sugar crashes.

It’s also important to load up on vitamins and minerals, such as leafy greens, dairy, and fortified foods, to help prevent iron, vitamin B12, and magnesium deficiencies.

3. Get enough sleep

Good sleep is crucial for combating semaglutide fatigue. Good sleep habits and a consistent nighttime routine can help. To improve sleep quality, experts advise against eating right before bed. Aim for seven to nine hours of sleep every night to increase energy levels.

4. Exercise regularly

Semaglutide is prescribed alongside a balanced diet and increased physical activity. However, when you’re tired, the last thing you feel like doing is exercising. Many studies show that physical activity increases dopamine levels, boosting mood and energy.

Start with low-impact exercises like walking, yoga, or light strength training. These activities can improve circulation, reduce stress, and enhance overall energy levels without overwhelming your body.

Other Common Side Effects of Semaglutide

Fatigue is just one possible side effect of semaglutide. As with other GLP-1 receptor agonists, semaglutide may cause other side effects. However, most are mild to moderate and tend to improve as your body adjusts to the medication.

Common side effects include:

• Nausea 
• Vomiting 
• Diarrhea
• Constipation 
• Decreased appetite 
• Dizziness
• Lightheadedness 
• Stomach pain
• Bloating 

Less common semaglutide side effects include:

• Injection site reactions
• Gallbladder issues
• Allergic reactions
• Hypoglycemia (Low blood sugar)

FAQs About Semaglutide and Fatigue

How long does fatigue last on semaglutide?

Fatigue from semaglutide is usually temporary and most common during the first few weeks of treatment or after a dose increase. As your body adjusts, the fatigue often improves within the first 2-6 weeks.

Can I take semaglutide if I already feel tired often?

If you frequently experience fatigue, talk to your healthcare provider before starting semaglutide. They may check for underlying causes, such as nutrient deficiencies or other conditions, before prescribing the medication.

Are there alternatives to semaglutide that don’t cause fatigue?

Yes, semaglutide alternatives are available. They include drugs like liraglutide (Saxenda, Victoza) or tirzepatide (Zepbound, Mounjaro), which your body may tolerate better. Your healthcare provider will help you choose the best option.

Does fatigue go away as my body adjusts to semaglutide?

Yes, for most people, fatigue decreases as their body adapts to the medication. Side effects, including fatigue, tend to be most noticeable during the dose-escalation phase. Many users report improved energy levels once a stable maintenance dose is reached.

Does semaglutide cause body aches?

Body aches are not commonly reported side effects of semaglutide, but some users experience muscle pain, joint discomfort, or flu-like symptoms. This may be related to dehydration or electrolyte imbalances.

Why Choose NP2GO for Your Semaglutide Treatment?

Semaglutide may make you feel tired, but for more people, this fatigue resolves within six weeks. Remember that the fatigue you’re experiencing is likely due to a decrease in blood sugar and calorie intake, both of which are benefits of this medication. Certain measures can help if you’re experiencing extreme fatigue: stay hydrated, eat a balanced diet, exercise, and maintain good sleep habits.

If your fatigue becomes unbearable or continues even after making lifestyle adjustments, it’s important to consult your healthcare provider. NP2GO offers a personalized and convenient approach to semaglutide treatment, ensuring you get the best care for your weight loss journey. We can suggest additional strategies to fight fatigue or help you adjust your treatment plan. We may also look for underlying medical conditions that may be causing your fatigue.

We serve over 38 states. Whether you’re in Oklahoma, Florida, Texas, or beyond, NP2GO provides accessible care to help you achieve your weight-loss goals. If you’re ready to start your journey,  schedule a consultation with us today to learn how semaglutide can help you lose weight!