My left eye is sinking. no pain but associated weakness with it in my left side of body.

Left eye sinking: Does nodoz help? You might have a neurological condition known as myasthenia gravis (mg). If by sinking you mean ptosis. In general, mg doesn't give one sided weakness. Can be asymmetric. Exam with a special tensilon test may help. A stroke is also possible. Nodoz is caffeine and may helps a little with weakness, tiredness, but is certainly not a cure or treatment. Please see a doctor.