Can Semaglutide Affect Your Mood?

Yes, semaglutide can coincide with mood shifts. Some women report low mood, anxiety or broken sleep while taking it, but those reports are uncommon in safety databases. In large controlled trials, researchers did not see higher risk of depression or suicidal thoughts with this type of weight loss drug, and many people say they feel steadier as weight drops and constant food thoughts fade. Shifts in mood still deserve attention, so track what you feel and tell your prescriber promptly about changes.

What did the largest trials find?

In January 2026 the FDA reviewed 91 placebo-controlled trials with more than 100,000 patients and found no increased risk of suicidal thoughts and behavior or other psychiatric events with GLP-1 drugs, the group that includes semaglutide FDA review summary. The agency then asked manufacturers to remove the suicidal thoughts and behavior warning from prescribing information.

A separate pooled analysis of data from the STEP 1, 2, 3 and 5 weight management trials included 3,377 adults with overweight or obesity in the 68-week STEP 1, 2 and 3 trials, alongside the 104-week STEP 5 trial STEP pooled analysis. Researchers checked depressive symptoms with PHQ-9, a nine-item questionnaire that asks about low mood and loss of interest, and checked suicidal thoughts and behavior with the Columbia scale, a standard interview that records intent and actions. That kind of planned, repeated measurement gives a clearer picture than scattered individual stories, though the trials enrolled people without known major mental illness at the start so they say less about women with active depression.

Why do some women still feel low or anxious?

Safety reports show that low mood does occur while women take these drugs, without showing that the drug caused it. An analysis of European EudraVigilance reports from January 2021 through May 2023 found 372 psychiatric reports among 31,444 total reports for semaglutide, liraglutide and tirzepatide, or about 1.2 in 100 reports EudraVigilance analysis. Women accounted for 65 percent of the psychiatric reports. Depression was listed most often, followed by anxiety and suicidal thoughts. Nine deaths from completed suicide and depression were recorded, mostly in men.

Online discussion points in the same mixed direction. A mixed-methods study of more than 40,000 comments across Reddit, YouTube and TikTok found sleep-related issues, including insomnia, were mentioned most often, with 620 matches, followed by anxiety with 353 matches and depression with 204 matches social media study. After people started a GLP-1 drug, weight loss coincided with marked mood improvement in some and mood worsening in others, along with better control of addictive behaviors for some. Poor sleep, nausea, rapid body change, stress around eating, and a prior history of anxiety or depression can all color those early weeks.

When should you check in about mood?

You know your baseline best. Note sleep, appetite apart from lower hunger, tearfulness, irritability, worry, and interest in people and activities you usually enjoy during the first weeks on semaglutide. Tell your prescriber promptly about new or worsening low mood, persistent anxiety, or insomnia that affects your days. If you have a history of depression, mention it at follow up so your care reflects it.

Contact your prescriber the same day or seek urgent care for any suicidal thoughts, plans, or behavior, or if someone close to you notices you withdrawing or talking about harming yourself. Do not change or stop your dose on your own because a sudden change can leave appetite, blood sugar and mood harder to track.