If you can be reasonably sure that your muscle pains are not from strained or bruised muscles or nerve damage, they could be a side effect of your medication.
Muscle, bone and joint pain are very common in people on medication. They are also very common in healthy people who do not take any medication. I have plenty of joint pain at the moment. It can be very painful. Right now both of my hips seem to be affected. I can hardly move. I hope that whatever its cause, this pain is only temporary. I hate it when these things just appear out of the blue. I've been putting up with this for more than a week.
Your aches are only temporary. I've had similar ones many times. Your body is still reacting to your new medication. If the aches persist, mention them to your doctor. Some doctors actually listen to their patients and will try to help find medications that their patients can tolerate.