Your question is not clear especially as you start with 'I had allergy' but dont tell us 'what to?'
for face is NOT recommended for prolonged use and treatment for pimples with tetracyclines (as your doctor has recommended 'doxy') is standard care. If it is pimples or acne you are suffering from, then 2nd line treatment is roaccuatane that your dermatologist
can prescribe but a blood count and liver function test needs to be done BEFORE starting this treatment.
If you have dermatitis
secondary to steroid use, then a steroid-panel patch test