Is the method of repaying the value of stolen medicines to the hospital by paying sums of money at spaced intervals, as if they were donations from a philanthropist, sufficient to expiate the sin and restore rights to their owners? And what should the questioner do if he is unable to determine the exact value of the medicines that were sold?

The repentance of a thief is not complete except by returning the stolen goods to their owner. This means returning the actual items if they exist, or, if not, returning their equivalent if they have one, or their value if they do not have an equivalent or if their quantity is unknown. If you sold the stolen medications and cannot determine their exact amount, then you must return their value by making an effort to estimate it to the best of your judgment. It is sufficient to return it to the hospital director if he is the owner or if he can deliver the money to those who are entitled to it.