more antibiotic may b one of the reason for dry throat.
you r advice to take some multi-vitamine along with medicines.
how ever if you beleive in acupressure and magnetotherapy u r advice;--
your nack area with magnetic oil B.D
2. Drink magnetic water B.D
3. Gargle with water charged with med. power south pole of magnet B.D
do this for one week and report.
Feel free to contact if required.