Any medicine can cause an allergic reaction. A few of the most common culprits are:
- Penicillins (such as nafcillin, ampicillin, or amoxicillin). These types of medicines cause the most drug allergies.
- Sulfa medicines.
- Barbiturates.
- Insulin.
- Vaccines.
- Anticonvulsants.
- Medicines for hyperthyroidism.
