Hi & Welcome.
There are no dietary restrictions during the course of anti-
rabies vaccination. The presently used anti-rabies vaccines are safe and do not require any diet precautions to be taken.
Regarding alcohol & its beverages like beer, whisky, etc do not interact with anti rabies vaccination at all. But you should keep the amount of alcohol intake to a moderate level only so that if at all you contact rabies, the symptoms will be easy to diagnose. The symptoms of too much drinking can mimic the symptoms of mental issues when rabies hits your system: confusion, agitation,
anxiety, muscle issues. It would be difficult to tell if your symptoms are from the alcohol or from the exposure to rabies.
Beside, alcohol can suppress your immunity.
So, it is better to avoid taking alcohol or its beverages as mentioned above.
You can eat any healthy, clean food (vegan & non-vegan) including sweets as you eat regularly.
Please continue taking complete dose of vaccine as recommended by your doctor on days 3, 7, 14 & 30.
Best wishes.