Why does the penicillin and lithium make you feel soo tired?

Penicillin can cause fatigue as a side effect due to its impact on the body's immune response and microbiome, which can lead to temporary feelings of weakness or exhaustion. Lithium, commonly used to treat Bipolar disorder, can also induce tiredness as it affects neurotransmitter levels and overall brain function. Both medications can disrupt normal physiological processes, contributing to feelings of fatigue. Always consult a healthcare professional for personalized advice regarding medication side effects.