R 331 (Propranolol 40 mg)
Pill imprint R 331 has been identified as Propranolol hydrochloride 40 mg.
Propranolol is used in the treatment of anxiety; performance anxiety; migraine prevention; benign essential tremor; intermittent explosive disorder (and more), and belongs to the drug classes group II antiarrhythmics, non-cardioselective beta blockers. Risk cannot be ruled out during pregnancy. Propranolol 40 mg is not subject to the Controlled Substances Act.
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