I need to know if there is any common chemical composition with medicinal drugs (crocin and saridon) since I am allergic to both of these medicines which develop itchy rashes on my body after consumption. I also need to know if there is any alternative to these medicines that I can consume
during illness like fever and other conditions.

Crocin and Saridon contain the drug paracetamol(acetaminophen).
Some people are allergic to this drug,and so it is better to avoid the above mentioned drugs.