Hi,
Redbull can not have any effect on your erection time and specially ejaculation time.it is an energy drink and you may feel energetic just for a few minutes after having it and might give you a feel that you are feeling energetic and you may be able to perform better.
Now yes there are drugs which can be given to increase your erection time as well as ejaculation time but drugs do have side effects and they can be prescribed only after examination.(because they have serious side effects)
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