According to the MHRA-approved Summary of Product Characteristics (SmPC), nausea is very common (affecting more than 1 in 10 people), while abdominal pain, vomiting, diarrhoea, and constipation are common (affecting between 1 in 100 and 1 in 10 people)
National Center for Biotechnology Information (NCBI) - The effects of L-carnitine supplementation on glycemic control: a systematic review and meta-analysis of randomized controlled trials, 2019
Longitudinal Multi-Omics Reveals Subset-Specific Mechanisms Underlying Irritable Bowel Syndrome
--- (2019) After December 7, 1941 Submarines Continue Attack on Hawaii. Images of Old Hawaii, December 8, 2019
Additionally, he advises them to watch for warning signs