India, Feb. 22 -- Medicines, in general, are extremely valuable substances that help us stay healthy. According to Dr Jay Jagannathan, a neurosurgeon at the Michigan Neurosurgery Institute specialising in multidisciplinary neurosurgery and pain management, they are "widely used for very real medical reasons." Some save lives while others can improve the quality of life.

However, taking to Instagram on February 22, the doctor cautioned that certain classes of drugs, especially those which have long-term or repeated use, may be associated with subtle changes in cognition and brain function.

"Studies have explored links to memory changes, slower processing speed, shifts in neurotransmitter balance, and, in some cases, structural difference...