You can also look up the website or the 800 number of the medication, and ask if this is a common side effect. I get nauseous on tetracycline, but not if I take it with food, for example, and that is the kind of thing you might find on the medication's information number or FAQ section. Also, failing being able to talk to a doctor, call a pharmacist and ask. The pharm number will be on your pill bottle.
Hi there. I don't know a doctor that doesn't have an on call policy meaning that yes, the office is closed but doctors are on call. You call the office and you will get a recording that says three things 1, if it can wait, call back during office hours, 2. if this is a life threatening emergency, call 911 or go to the emergency room or 3. to speak with the physician on call, do X.
In this scenario you want number 3.
You really should talk to the doctor on call which will either be your doctor or someone covering for him about stopping your medication. They may say it is just fine and then call in an alternative. Or they may give you suggestions on how to take the medication to reduce nausea and dizziness.
Examples of that are to take it with a full stomach, with a full glass of water, etc. ---- any other tips they may know of to reduce side effects.
So, call and ask the on call physician. good luck