Answer:
For the blind it would be difficult to know whether the prescription they are getting is correct. Though they have the advantage of verbal communication, if there is any mistake on the amount or type of medication they have asked for it would be impossible to know unless there was someone else there with them.
For the deaf the language barrier becomes a problem as they often cannot communicate verbally and the pharmacists may not know sign language. This can become frustrating for both parties when they aren't being understood. You cannot ask for a medication if you cannot describe your pain to the pharmacist unless you already have a prescription.
Step-by-step explanation: