Oral medicines for ED usually work well and cause few side effects. Many of these events were reported to occur during or shortly after sexual activity, and a few were reported to occur shortly after the use of CIALIS without sexual activity. When tadalafil was administered to subjects taking theophylline, a small augmentation 3 beats per minute of the increase in heart rate associated with theophylline was observed. When medical treatment was necessary, acetaminophen or non-steroidal anti-inflammatory drugs were generally effective; however, in a small percentage of subjects who required treatment, a mild narcotic e. However, due to stock shortages and other unknown variables we cannot provide any guarantee. In vitro studies have shown that the effect of tadalafil is more potent on PDE5 than on other phosphodiesterases. Medicines that you take by mouth are called oral medicines.headache. indigestion. back pain. muscle pain. flushing. stuffy nose. Patients who get back pain and muscle aches usually get them 12 to 24 hours after taking Cialis and these usually go away by. The drug comes in low-dose versions that can be taken daily. This means you can have sex at any time, rather than needing to take a pill from time to time as needed like other ED brands. The starting dose for daily-use Cialis is milligrams (mg). If that doesn’t work, you can increase your daily dose up to 5 mg. Find your nearest Walmart Pharmacy in Lakeland, Florida. View store hours, reviews, contact information and prescription savings with GoodRx. (Cialis) (Generic Cialis) 30 tablets 5mg. $ with free Discount. Get Free: Discount. sildenafil (Generic Revatio, Viagra) 30 tablets mg. $ with free Discount.