as per u, you had deanxit
10 years back .
u took for 6 month and u were well .
now u are feeling everytime dizziness
, are current symptom similar to previous which u experienced 10 year back .
u should consult to your doctor . might be suffering from similar illness .
get complete examination .
u may be anemic , go for CBC complete hectogram .
go for thyroid profile to rule out hypothyroidism
hope this will help u .