Well, it sounds like you started with one BP med in the angiotensin II receptor blocker (ARB) class, and then your doctor switched you to another drug in that same class. These drugs do affect potassium, which can affect muscle function but otherwise, I haven’t heard of them being particularly associated with joint pain, and I didn’t see much mention of this when I looked just now in my clinical reference (Uptodate.com).

According to the American College of Cardiology and the American Heart Association, the goal of blood pressure treatment is to attain a blood pressure reading that's less than 130/80 mmHg systolic and less than 80mmHg diastolic. In general, if you have hypertension, it is likely that you will need to be treated for the duration of your life to maintain this target blood pressure. 
Eat potassium- and magnesium-rich foods. Potassium can help regulate your heart rate and can reduce the effect that sodium has on your blood pressure. Foods like bananas, melons, oranges, apricots, avocados, dairy, leafy green vegetables, tomatoes, potatoes, sweet potatoes, tuna, salmon, beans, nuts, and seeds have lots of potassium.  Magnesium is thought to help blood vessels relax, making it easier for blood to pass through. Foods rich in magnesium include vegetables, dairy, chicken, legumes, and whole grains. It’s better to get vitamins and minerals from food, and a heart-healthy diet like the one we described above is a good way to ensure you get plenty of nutrients. However, you may want to talk to your doctor about whether taking certain supplements might help your blood pressure.
Several Indian studies over the last few years have shown that Arjuna, in animals and in humans, reduces total cholesterol and increases HDL (“good” cholesterol). One study showed that this herb was as effective an antioxidant as vitamin E and that it reduced cholesterol in the human subjects quite substantially. Considering its benefit for cholesterol, it is not surprising that it lowers blood pressure; many cases of high blood pressure in the United States are caused by cholesterol accumulation in the arteries. 

Sprinkling ground flaxseed over your meals can make a big impact on your blood pressure readings. In a 2013 study published in the journal Hypertension, participants with high blood pressure and peripheral artery disease ate 30 grams (about an ounce) of milled flaxseed daily. After six months, their systolic blood pressure (the top number) went down by 15 mm Hg, on average, and their diastolic blood pressure (the bottom number) dropped by 7 mm Hg.
Thank you so much for your highly informative article on hypertension for seniors–the best one that I have read. Presently, my wife, age 78, weight 98 lbs., height 4′ 11″, has been on a 4 m Atacand (brand name) per day for close to ten years now. Healthwise, I was concerned about its side effects on her. Pricewise, it is a very, very costly drug and our plan now requires her to pay a newly required deductible of $350 before reaching a new copay that has also become more expensive as well. She does not smoke or drink. Her family doctor has suggested that she switches to a generic brand Atacand but she prefers not to risk with its poorer bioavailability. Is such a preference valid? Are there any benefits in a generic that would outweigh its bioavailability constraint? Is there any alternative brand name drug that would offer her a good transition? Thank you kindly again for sharing the above highly informative, useful, and rare article regarding hypertension for seniors. I’d look forward to your reply with great appreciation–if I may.
Eat beets: Rich in vitamins and minerals, this root vegetable can help decrease blood pressure. A 2010 study in hypertension found that drinking only 250ml of juice was needed have a positive effect on blood pressure. Many of the participants saw lowered blood pressure within 24 hours. Another study from 2012 saw that beetroot juice helped lower systolic blood pressure.