Ich can damage the fins of fish without them having fin rot. Fin rot could set in as a secondary infection following Ich, you need to be sure that the fins have not been damaged by Ich only, and that they do indeed have fin rot, before you medicate for both.
I have used Esha Exit for Ich, which can be used in conjunction with Esha 2000. These meds together will treat Ich, velvet, fungus, finrot and bacterial infections. They will also help heal wounds, ulcers and gill problems.
I have not heard of an all in one medication, and you need to be very careful that multiple medicines are compatible. Some require you wait a period of time and perform large daily water changes whilst filtering over carbon before starting a new med.
The Esha products are biodegradable, needing no carbon to remove them following treatment, and these particular two products can be used together. They are also safe for scaleless fish and will not harm the bacteria in your filter.
If it is fin damage following Ich, and not fin rot, you could use Melafix to help heal the fins. Melafix will not teat any bacterial/fungul infection, though, only help repair the damage.
Note: The Esha product (Esha 2000) is cheaper than Melafix and will treat as well as repair.
Esha Products
HTH