Erector Spinae Block Versus Thoracic Paravertebral Block for Acute Thoracic Herpes Zoster

Patients of this group will receive standard treatment for herpes zoster which include acyclovir 800 mg, 5 times daily administered orally within the first 72 hours and analgesics as needed

Patients of this group will receive 25 mg bupivacaine 0.5%, plus 8 mg dexamethasone in a total volume of 10 ml (The final concentration of bupivacaine will be 0.25%) to be injected beneath the erector spinae muscle sheath) at the desired level under ultrasonography.

Patients of this group will receive 25 mg bupivacaine 0.5% , plus 8mg dexamethasone in a total volume of 10 ml(The final concentration of bupivacaine will be 0.25%) to be injected in the Paravertebral space at desired level under ultrasonography