yes on the first question, and you would need to know the half life on the injectable version first. Contact the clinic, as they should know the half life of the drug. I dont think anavar being that its not a 17aa alkaloid is very liver toxic anyways. I have seen studies which show no hepa toxicity after pretty long runs(cant remember the study exactly).
Anavar Profile
[17b-hydroxy-17a-methyl-2-oxa-5a-androstane-3-one]
Molecular Weight: 306.4442
Formula: C19H30O3
Melting Point: 235 238 Celcius
Manufacturer: BTG, SPA, Originally Searle (1964)
Effective dose: (Men)20-100mgs/day (or .125mg/kg~bdywt); (Women) 2.5-20mgs.day
Active Life: 8-12 hours
Detection Time: 3 weeks
Anabolic/Androgenic Ratio (Range): 322-630:24