Why does my grandmother have dizziness, headache, and vomiting frequently?

Hello,

Welcome to icliniq.com.

From the symptoms that you mentioned, it seems your grandmother has a migraine that reoccurs when she is either exposed to an allergen, which triggers her migraine, or it can also manifest as a seasonal change. How long has she been having this problem? During her migraine episodes, how long does it last?

I will recommend the following medicines,

1) Tablet Crocin pain relief one tablet twice daily after food.

2) Tablet Ondem (Ondansetron) 4 mg, if there is severe nausea two tablets can be taken at once.

Make sure her BP (blood pressure) is under control. If possible get it monitored. Ask her to avoid caffeine.

I hope this helps.