<s>[INST] when i am in heavy sleep i feel loss of sensation in my lower part of legs nd some fingers of my arm as my head is pulling all the blood to it.i get up ffrom my sleep suddenly nd slowly the limbs become normal.is taking pregabanyl nd methylcobalamin capsules ok for it? [/INST] Hello, Pregabalin and Methylcobalamin are okay to be used for sensation problems with limbs as symptomatic treatment. However, the cause should be found and treated. Nerve conduction study and Doppler ultrasound of the limbs are necessary to understand if the problem arises from nerves or from the blood supply. Discuss with your Doctor for these issues. Hope I have answered your query. Let me know if I can assist you further.  </s>