Yes. In most cases, you can find prices and coupons that will discount any quantity your prescription has been written for. The GoodRx website and mobile app will allow you to select or enter any custom quantity to match your prescription. Learn how to change your quantity here.
It is important to note that GoodRx coupons can only be used to purchase up to a 90-day supply at one time. For example, if your prescription is written for 180 tablets of 10mg atorvastatin (twice a day) over 90 days, you can use a GoodRx coupon to fill the prescription.
The prescription must also fall within the FDA daily recommended dosage, i.e., if the FDA recommends no more than 300mg per day of "x," your prescription for "x" must be no more than 300mg per day.