You can try a full dose. I bought a blood pressure cuff and yes my bp dropped. You can drink water and eat something salty, as @gently wrote.

No need for tylenol or meclizine or any premed. I doubt meclizine would evne work.

If the full dose is too much, try 1/2 dose. If a half dose is too much, try 1/4 dose. The pen has clicks that measure the dose and 8 clicks is a full dose. You can also choose to start low (2 clicks). The body seems to adjust over time so you can ramp up to whatever dose you tolerate.

Don't be too scared! Tymlos leaves quickly and you can play around with it in terms of tolerability. It gave me excellent gains!