The frontman also recalled dancing in the pharmacy as he waited for a prescription.
Fran had to head for emergency surgery after he was mauled in the Hollywood Hills by a sausage dog in October.
He’d been trying to be a Good Samaritan to save the dog from being knocked over at the time and it bit him in return.
Fran, who admitted that the incident left him unable to play guitar, had shared images of the x-ray, and his new bandages following the procedure to amend fluid on the joints and a possible torn tendon.
He has now told fans that he is well into recovery though needs to do a variety of hand exercises five times every day to ensure that his finger remains flexible.
And as he gave fans an update, he also told them that he was so out of it following his emergency operation two weeks ago that he wasn’t even sure how he got home.
He thanked his followers for their messages on Twitter and said: “The surgery went fine I think. Will take a fair bit of rehab though. My friend picked me up from the clinic.
“Have zero recollection of getting home. Apparently I was dancing in CVS.”
CVS or ‘Consumer Value Stores’ is a pharmacy chain in the US.
Hearing his comments, fans wished Fran well.
One said: “Feel better soon. Dancing in CVS is freeing ..I do it when I’m not high.”
And antoher joked: “They gave you the good stuff.”