Short-term diarrhoea:
Adults and children over 12 years: Take 2 tablets to start treatment. Take 1 tablet after each loose bowel movement, up to a maximum of 6 tablets per day. If your diarrhoea lasts for more than 48 hours, consult your doctor.

IBS diarrhoea, diagnosed by a doctor:
Adults aged 18 years and over: Take 2 tablets to start treatment. Take 1 tablet after each loose bowel movement, or as previously advised by a doctor, up to a maximum of 6 tablets per day. You can use this medicine for up to 2 weeks for repeated attacks, but do not take for any one attack lasting longer than 48 hours. I.

Room temperature

Loperamide Hydrochloride 2mg

https://www.medicines.org.uk/emc/files/pil.367.pdf