I just made a weird Reglan discovery

So my last pregnancy was an Aggressive HG pregnancy, this one is bad but I’m able to mostly stay hydrated, not gaining weight I’m 21 weeks and down 6lbs but it’s better than the last. Well that was until this week I got the flu and got desperate after puking even my saliva up so I reached for my expired reglan from my last pregnancy while I waited for drs to get back to me with something for this(it worked) however I was prescribed it more near the end of my last pregnancy and I remember my hands and feet itching and then thinking it could be liver issues…..well the itching returned after 2 doses my guess is it’s a mild allergy but it’s literally just my palms and soles so it mimics IC which is why they were worried the last time around. Just a weird thing and I wonder if I’m alone in this response