Source: GLP-1.Reviews editorial walkthrough on April 13, 2026
Contact your GP, healthcare provider, or if you need urgent advice NHS 111 if you experience: A persistent resting heart rate above 100 bpm (resting tachycardia) Palpitations a sensation of a racing, fluttering, or pounding heartbeat Dizziness, light-headedness, or near-fainting episodes Chest discomfort or tightness, particularly if associated with exertion Shortness of breath that is new or worsening Fatigue that is disproportionate to your level of activity Seek emergency medical attention (call 999 or go to A&E) if you experience: Chest pain radiating to the arm, jaw, or back Sudden severe breathlessness Loss of consciousness or collapse A very rapid or irregular heartbeat that does not settle within a few minutes Some symptoms, such as mild palpitations or a sensation of a faster heartbeat, may be transient and occur particularly after dose escalation

The aim of our study was to investigate specific types of microbiota-derived metabolites, especially bile acids, short-chain fatty acids, vitamins, amino acids, serotonin and hypoxanthine, which are all implicated in the pathogenesis of IBS
But if youre finding them too difficult to manage or theyre getting worse, you should speak to your clinician
Mild nausea, reduced appetite, and occasional digestive changes are common during weeks 14 as your GLP-1 system activates