Hi my friend lives in Dubai and she has to renew...

Dear Customer
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Dear customer :
we dont have enough information about the medication ( drug ) that your wife have used it before , and we dont know what is her medical condition . but we will answer you in general about your concerns 
What are the medical test for Dubai visa ?
1. Blood test
2. Chest X-ray
3. Tuberculosis
4. Hepatitis A, Hepatitis B and Hepatitis C
5. HIV / Aids
6. Syphilis
7. Pregnancy tests
8. Leprosy
Will be there a screening for drugs ?
its unlikely to have a screening for drugs in Dubai visa medical test
Should you be worried ?
- if its an illegal drug , then you have to be worried not only because the visa related legal issues , but also about the user overall health , and we advise to get help as soon as possible 
- if its a legal drug , then you dont have to worry at all , just provide the doctor prescribe just in case they asked for it , but as we mentioned earlier , its unlikely 
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Kind Regards