Generics always have the active substance indicated below the trademark so you can easily find the drug you need.
If the manufacturer is a well-known and reputable company such as Cipla, Sun Pharma, and others, you can be sure that you will get the same quality as from the branded medication.
The differences can be minor and only in the auxiliary components of the pills, spray, and so on.
But you should also pay attention to where you buy allergy medications.
The best place is a reputable online drugstore that offers low prices and high quality generics.