thanks for using Health Care magic .
I would be pleased to answer your question
The itchy palms , cough and nausea
can occur commonly when you have a general tendency to be Allergic to some external factors .
They can be treated individually .
for the itching palms you can apply intensive Hydrating cream from (neutrogena Hand cream)
for the dry cough
you can take an antihistamine which will also help in reducing the itching as well as certain lozenges for the dry throat .
and for the nausea you can take an antiacidity medication like zantac
150 mg .
I would suggest you to meet the physician in case you don't feel better after 2 days of trying the above treatment.
Thanks and Take care