Hello  gangadhar.anugandula, 
greetings fromhealthcaremagic.com
I am Dr Sourav Chakraborty and i will be helping you with your query 
Going by you case history the current symptoms you are suffering from like " 
dizziness , sleepy, body pains, shaky body feelings, heavy weight in head, 
constipation , reduced appetite "  can be attributed to the intake of the medicine " Duzela " or 
duloxetine , but suddenly stopping it can cause seizures so please go visit your physician at the earliest , as i believe the dosage for you need to be revised.
The medication by the name  " Nexito forte " or escitalopram is known to cause rarely such similar symptoms . Nausea, diarrhoea, increased sweating, insomnia, ejaculation disorder, 
postural hypotension, 
sinusitis, taste disturbances, appetite disorder are the other adverse reactions to look out for .
some people  have suffered from side effects from this drug but with adequate dose adjustments it has given promising response too, please visit your doctor regularly . 
Hope i have been lucid in my approach. Take care.