Tirz dosing question

Currently on my 6th week of tirz ( I pin on Monday’s) . I noticed I got really hungry this Friday afternoon almost as if it had completely worn off. So I pinned 5 mg this morning Saturday. I’ve read a couple of different opinions regarding half life and optimal dosing . I feel great on 5mg and I’ve lost 40 pounds in 3 months . Would 5mg every 4.5 days be more efficient than taking a 7.5 dose weekly ?