No weakness or fatigue other than the fact that being in pain is tiring!
I think the pain is more like nerve pain than muscle pain but the only area tender to touch, and only very slightly, is the outside of the calf muscle.
There is no pain as I sit and write this but if I try to rotate my ankle by turning the foot inwards, there is a moderately sharp pain on the inside of the ankle bone and tingling up the outside of the calf muscle to just below the knee.
Thank you. The pain is from the ankle to the calf rather than vice versa and the pain came on several hours after I finished the course of the drug but your assessment that it is probably a sign of side effects makes sense and is reassuring. I hope it does not last 1-2 weeks, though!