Keto Extra Strength These types of drug allergy symptoms are dangerous because swelling can develop in the throat and tongue, which can cause breathing problems and death.Drug allergy can also manifest as fever , muscle and joint pain , swollen lymph nodes , shortness of breath , vomiting , nausea or diarrhea .An allergic reaction does not always appear immediately after taking the drug. It can occur up to one week after starting treatmentimportantBe sure to specify which medicine makes you allergic!After the appearance of drug allergies, you should check with an allergist as soon as possible who exactly the agent is allergic to. Otherwise, the next use of the drug may cause stronger symptoms