Answering worriedgrlfrnd:
Dbol is an Oral steroid which therefore passes through the liver and pro-longed use/large dosaged fucks up the liver. That is why people inject so it all does into first pass though the liver.
To protect the liver there is Milk Thistle (get from any vitamin shop, Wallmark, super market etc). There is also Liv.52 from Himalaya (better), plus drinking lots of water to cleanse the whole system.
Liver cleanse: Milk Thistle Part 1
Most would do dbol for 4 weeks with injectable steroids like Decca + Testerone Enatate. Ent is the longer acting version so you do not need to inject every day ED or every other day EOD.
Also DBol should be spread throughout the day, not as one dose.
Sounds like he has never done gear (steroids before) so would advise who searches for beginner cycles here,
Steroid Encyclopaedia - the ultimate guide to anabolic steroids (paid excellent site, with good suppliers), google.
Also best to have 6-8 meals a day high in protein (250-450g a day!)
Then there is issues which may occur! Gyno (sore nipples turning into Women breasts (Bitch Tits)), Blood Pressure rising (mine goes up 20-60, but on meds against it). Also when he comes off his balls will not straight away start making testerone again, so he needs a good PCT to get the balls working quickly (Post Cycle Therapy) (search here/google again). If he skips PCT most of the gains he will lose. So PCT is essential!!!
The first time is so special, as when you get most gains so would research it thoroughly,
PS Your a good girlfriend to find info for him.