Dizziness, weakness of body, low fever at night,...

What is the treatment in your case ? 
No drug can treat you symptoms alone before the nedded investigation be done and the disease be diagnosed. if these are acute symptoms, then it might be because acute viral, bacterial infection or common cold which is treated by hot drinks like medical herbs,  and sometimed with antibiotics eg Augmin . I also advise you to eat a healthful diet full , you can  also use medication like vitacare for supplemental vitamins.  
What are the recommended investigation ?
 , the physician will firstly examin you if you have other pathological symptoms , then he will order some investigations like total blood count , chest xray . he might also order thyroid function test . sometimes Brain MRI may be done
What are the expected causes ? 

1. acute infections 
2. common cold
3. Anemia 
4. Vitamins deficiencies 
5. lymphoma 
6. Hormonal disturbances

 what we advise ? 
we advise you to follow the instructions above and perform the recommended investigations
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