Is it ok if i take diet supplements such as green tea fit weight loss supplement if i am taking citalopram 40mg will it effect me?

Do not waste your $: Do not waste your money with "weight loss supplements". If you want to acheive weight loss, reduce your carbs to a bare minimum, drink only water, eat lots of low starch veggies.

It depends: "green tea fit" also contains guarana and acai berry. Guarana is a stimulant containing caffeine, which stimulates the central nervous system, heart, and muscles. If you're taking citalopram because of anxiety, this supplement could worsen that. There are no interactions between citalopram & these ingredients, but you'll still need exercise & healthy foods (lean protein, non-starchy veggies, etc.