[Ninja_Assassin]

Sidegra is manufactured by GPO (Government Pharmaceutical Organisation) which is a gahmen dept.
The recommended retail price is 198baht for each box of 4 tabs regardless of 50mg or 100mg. Most standalone pharmacies in BKK are selling it at 250baht..... the bigger pharmacy chains sell them at higher price between 300-400baht. Similar outside of BKK in Patts / Hdy / CM etc.... will see higher retail pricing.
So if someone is selling you below 198baht.... most probably you are buying fake Sidegra tabs..... or expired tabs.

The real Mc-coy comes with 4 tabs in a box which has a GPO seal and expiry date. If there is no seal on the box or it is torn.... do not buy.

Sometimes you get entrepreneurs who will buy boxes of the expired Sidegra who will then repack them into individual tabs in aluminium foils to sell them at nightspots , road stalls, bars, night markets , online , convenient stores and even available from tuk tuk drivers.

Consuming these expired tabs may not kill you..... but expired medicine is just like a placebo and will not be effective. Your health is more important than saving a few bahts.