There are a few questions you should address, in addition to whether you should be taking the medication.
From your description, I assume you have seen a cardiologist and had a proper assessment. If you haven't done so, you should do it soon.
1) what is the cause of the PVC?
For most cases, the cause is unknown, or almost impossible to trace any more. In small number, there may be an important cause that needs to be addressed.
2) is the PVC dangerous type? What are the issues?
This involves detailed assessment and risk stratification. Generally speaking, it would involve echocardiogram, 24 hour holter, treadmill ECG, and in some cases cardiac MRI and CT coronary angiogram.
Majority of PVCc are not dangerous, but some could be. They may result in heart failure and even cardiac arrest. In addition, some patients may have symptoms (eg. palpitation, shortness of breath, dizziness). Some patients have no symptoms despite frequent PVC.
3) natural history of the condition.
Some would improve on its own but many won't. There may be precipitating factors that you have identified so far (some are mentioned by Dr Lim Choon Pin) and you should avoid them.
4) treatment options.
Treatment is directed at underlying condition and (potential) issues they are causing.
a) treat underlying condition if there is one (majority do not have one)
b) if no symptom AND the PVC is not the dangerous type, then no treatment is necessary. However, patient will need monitoring with repeat echocardiogram and Holter in the future.
c) if symptom is minor AND the PVC is not the dangerous type, may or not may need medication (depends on individual). Medicine has potential side effect and only works in 50%. How bad is the symptom is a subjective thing for individual patient to decide.
d) if symptom is troublesome (affecting one's life) OR PVC is the dangerous type, then the patient would need treatment. This could be medication - 50% effective and only controls and doesn't cure - with further monitoring/assessment. Alternative treatment is ablation (key hole procedure through groin) which is curative in around 85% of cases. However, ablation is invasive and carry some risks. So, it is usually reserved for highly symptomatic patient or dangerous type of PVC.
If you have further issues, you should consider consulting a cardiologist experienced in treating your condition.