Oh, I didn't answer the question.
If I had a partner pharmacist, I would allocate all overlap hours (4 in this case) to Monday, then
A = pharmacist A
B = pharmacist B
Week 1:
B B B A B A A
_ A
Week 2:
A A A B A B B
_ B
(Underscore is just to force spacing for SMTWTF)
Monday split with opening shift 8 hours, closing 9 hours, so 43 for both pharmacists. 6 days off each per 2 weeks with alternating weekends off.
You could also do 7 on and 7 off, split shift more days, etc.
With no overlap, I could just have the one person working five straight days take all of Monday, so the split per week would be 47 one pharmacist, 35 the other (41 hours base per 2 weeks)