Since your sciatica (sharp, radiating leg pain due to compression of the sciatic nerve) has persisted for nearly a year despite medication, it would be wise to consult a doctor or neurologist for a detailed evaluation, possibly including imaging, to identify the exact cause. Long-term smoking can worsen nerve and disc health, so reducing or stopping smoking is strongly recommended. You may benefit from regular physiotherapy and lifestyle changes, and if needed, your doctor may also suggest other procedures to better control the pain. It is important not to adjust your medicines on your own and to follow a treatment plan tailored to your condition.