If i was prescribed flygal for trich one dose. how long will it take to treat it and if i had sex 3 days later with an infected person do i need to?

Maybe repeat Rx: Symptoms of trich ought to be better in 2-3 days and gone by a week. However, unprotected sex 3 days later could have reexposed you, so re-treatment might be a good idea. Return to the doctor or clinic, and this time take your partner so he can be treated in person. Also, other STDs are very common along with trich; you both should be tested for gonorrhea and chlamydia.