One of my heart meds causes my skin to react very adversely to the sun, even when it's cloudy. I'm supposed to wear sunblock (ie not just a sunscreen) all the time when I'm outdoors, plus a UV blocking hat and anti UV glasses. No shorts, no sleeveless tops, gloves for my hands whatever I'm doing. Apart from providing a hilarious sight to anyone who sees me, this is the
biggest drag as you can imagine, when you're trying to work, boiling hot, hat falls over your face, specs steam up..... I hate it. But having forgotten the advice a couple of times and suffered bad burning after only a short time outdoors, I try to comply. My family has a tendency to have pre-malignant solar keratosis (caused by the sun and can turn malignant) so having seen what it's like for them, I have always tried to protect my skin from the sun, even before I started on the med. Also for a while I worked in Plastic Surgery, where tiny blemishes had quickly turned highly malignant and young people were dying - heart breaking.
So - don't forget your sunscreen, even when it's cloudy in the summer....cos you're worf it