After taking covixin vaccine dry cough started. 1. Its been almost 3 week no relive to dry cough. Below medicines I have taken but no relieve tab doxy 1 (100 mg) doxycycline-100 mg years grilinctus (1/2 tsp (2.5 ml)) 1-1-1 x 5 days. Tab hetrazan (50 mg) diethyl carbamazine citrate-50 mg mobile I don't have fever, headache, appetite is also ok. Any permanent solution to fix this.