It is crucial to understand that using more than one medicine without consulting a professional can result insevere complications. The following categories of drugs might adversely interact with hydroxychloroquine:

Heart medication
Consuming drugs like digoxin with hydroxychloroquine can increase your body's digoxin levels, resulting in increased digoxin side effects.

Diabetes medication
Diabetes drugs decrease your blood sugar levels, and consuming hydroxychloroquine with these medications can cause severely low blood sugar.
If you have diabetes, ask your doctor to lower your insulin dosage or other diabetes drugs you are consuming before taking hydroxychloroquine.
The diabetes meds that can interact with hydroxychloroquine includes:
repaglinide
glyburide
glimepiride
glipizide
chlorpropamide

Meds that affect heart rhythm
Try to avoid using hydroxychloroquine with medicines that can cause heart arrhythmias. Consuming it with these medications can cause severely irregular heart rhythm.
Avoid the following medications while using hydroxychloroquine:
clarithromycin
chlorpromazine
amiodarone