<s>[INST] dear sir i am ahmad from pakistan. i have problem of asthima. medical specialist has advised me tablets Myteka( montelukast sodium ) 10 mg and tablets theograd ( theophylline ) 350 mg. i am using these since last two days. but i am feeling weakness and dizziness . i need your king advise please. regards ahmad peshawar. pakistan [/INST] Dear Ahmed, welcome to Chat Doctor. Dizziness and weakness may be due to high carbon dioxide due to asthma attack. Are you breathless? Did you have fever, cough, sputum? It may also occur with infection. Theophylline can cause tremors, jitteriness etc. You may get better Chat Doctor.  Please post greater details of your problems and better see your doctor again about these issues. Please revert for any more help from me here. I hope I clarified your query. Thanks ! Take care! </s>