Maxalt and Frova are both triptans. You can only take 2 of either in any 24hrs, you must not exceed this dose. Now if you have had Maxalt and then think you will try Frova in any 24hrs this is not safe, you must not mix your triptans!
The Triptans are abortive medication which you take to stop an attack once it has started. Maxalt has a short half-life (the amount of time it stays in your body after it has worked) but Frova has a half-life of up to 26 hours so can be a good one to keep you pain free for some time after your attack, especially if you have an important occasion the next day that you want to be well for!! However, if taken too often Frova can lose some effectiveness. Frova can also be very slow to take effect. Maxalt usually has a faster result.
Hope this helps, take care
Co-Moderator of the Migraine/Headache Forum