I am a 34 year old female who has an std trich and I was takin both metronidazole 500 mg fr ten days twice a day but couldn't keep them down and then he put me 250 mg fr ten days three times a day!!! i couldn't take them either cause my immune system is weak to the taste!!! So he put me on metrondizale gel 75 percent twice a day fr ten days!!! i just want to know is this effective as well as the pills??? when I finish the 10 day when can I start having sex with my husband???