These improvements were noted not only at the end-of-study but at all time points in between. If you are due to have an operation or any dental treatment, please tell the person carrying out the treatment which medicines you are taking. The table below contains some of the most common ones associated with dapoxetine. Take the container with you, even if it is empty. A chemical in grapefruit juice can increase the amount of dapoxetine in your bloodstream and this increases the risk of side-effects.rows · DrugBank Accession Number. DB Background. Dapoxetine is a selective serotonin reuptake. Dapoxetine is a short-acting selective serotonin re-uptake inhibitor. Indications and dose. 4 rows · Dapoxetine is prescribed for the treatment of premature ejaculation. Take one tablet hours.