Is there any withdrawal symptoms or do you have to wean off propranolol er 80 mg capsule when you stop it. how you do it since it is capsule.

Yes: Beta-blockers like propanolol need to be weaned off gradually, or your system will be overly stimulation to beta stimulation (your own adrenaline). Consider cutting the dose in half for a week, then a fourth for another week, then every other day for 4-6 days before stopping. You can ask for a smaller capsule strength, or buy empty gelatin capsules and split the dose.